UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSR CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number: 811-06350 Active Assets California Tax-Free Trust (Exact name of registrant as specified in charter) 1221 Avenue of the Americas, New York, New York 10020 (Address of principal executive offices) (Zip code) Ronald E. Robison 1221 Avenue of the Americas, New York, New York 10020 (Name and address of agent for service) Registrant's telephone number, including area code: 212-762-4000 Date of fiscal year end: June 30, 2007 Date of reporting period: December 31, 2006 Item 1 - Report to Shareholders Welcome, Shareholder: In this report, you'll learn about how your investment in Active Assets California Tax-Free Trust performed during the semiannual period. We will provide an overview of the market conditions, and discuss some of the factors that affected performance during the reporting period. In addition, this report includes the Fund's financial statements and a list of Fund investments. THIS MATERIAL MUST BE PRECEDED OR ACCOMPANIED BY A PROSPECTUS FOR THE FUND BEING OFFERED. MARKET FORECASTS PROVIDED IN THIS REPORT MAY NOT NECESSARILY COME TO PASS. THERE IS NO ASSURANCE THAT A MUTUAL FUND WILL ACHIEVE ITS INVESTMENT OBJECTIVE. AN INVESTMENT IN A MONEY MARKET FUND IS NOT INSURED OR GUARANTEED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION OR ANY OTHER GOVERNMENT AGENCY. ALTHOUGH THE FUND SEEKS TO PRESERVE THE VALUE OF AN INVESTMENT AT $1.00 PER SHARE, IT IS POSSIBLE TO LOSE MONEY BY INVESTING IN THE FUND. PLEASE SEE THE PROSPECTUS FOR MORE COMPLETE INFORMATION ON INVESTMENT RISKS. FUND REPORT For the six months ended December 31, 2006 MARKET CONDITIONS During the second half of 2006, as economic growth moderated and inflation concerns eased, the Federal Open Market Committee (the "Fed") finally paused in its record two-year cycle of monetary tightening, electing to keep the target federal funds rate unchanged at 5.25 percent, where it had stood since the end of June. Despite the pause in its tightening campaign, the Fed continued to stress that policy makers considered inflation to be "uncomfortably high" and further actions regarding interest rates would be data dependent. In response to the Fed's decision to maintain a stable monetary policy during the period, U.S. Treasury rates -- which had been steadily climbing during the first six months of the year -- reversed course and drifted lower throughout most of the remaining year. Most of these yield changes, however, occurred on the short end of the yield curve. Yields on municipal money-market securities generally declined during the reporting period and the spread between one-week and one-year tax-exempt paper contracted from already compressed levels. During periods of technical supply and demand imbalances in the variable-rate demand note market, the slope of the short-term municipal curve became inverted wherein shorter-maturity securities had higher yields than those with longer maturities. The Bond Buyer One Year Note Index, a benchmark indicator for the longest maturities in the tax-free money market sector, declined from its high for the period of 3.77 percent to 3.51 percent in mid-September, then held steady to finish the year at 3.52 percent. Although yields for daily and weekly variable rate demand obligations (VRDO) also ended the year lower, yield swings were much more dramatic due to the fact that these instruments are the most frequently used to meet changing cash flows. Weekly VRDO yields peaked at 3.97 percent in July then fell to a low of 3.35 percent in September before rebounding to 3.91 percent at year end. California's economic and fiscal recovery continued during the reporting period. Stronger-than-expected personal income tax receipts contributed to growth in revenues, some of which, however, was offset by softer-than-expected corporate tax and sales receipts. With the exception of the real estate sector, job growth, wages and business earnings in most California industries remained healthy and as of year end, the state's unemployment rate stood at 4.6 percent, down from 5.1 percent one year earlier. PERFORMANCE ANALYSIS As of December 31, 2006, Active Assets California Tax-Free Trust had net assets of approximately $1.6 billion and an average portfolio maturity of 17 days. For the six-month period ended December 31, 2006, the Fund provided a total return of 1.45 percent. For the seven-day period ended December 31, 2006, the Fund provided an effective annualized yield of 3.23 percent and a current yield of 3.18 percent, while its 30-day moving average yield for December was 2.92 percent. Past performance is no guarantee of future results. 2 Throughout the reporting period, we continued to follow our research-intensive approach, selectively investing only in those securities that we believed would add value while still meeting our conservative, risk-conscious criteria. Given our expectations that the target federal funds rate would remain stable through the end of the year, we adopted a laddered portfolio structure by investing in securities with a range of different maturities. We also modestly reduced the portfolio's allocation to variable-rate securities early in the period, selectively investing the proceeds in short-term commercial paper and notes in order to lock in higher yields. We continued to find reasonable value in securities with maturities of six months or less. At the end of the reporting period, 98 percent of the portfolio's assets fell within this maturity range. There is no guarantee that any sectors mentioned will continue to perform as discussed herein or that securities in such sectors will be held by the Fund in the future. <Table> <Caption> PORTFOLIO COMPOSITION Variable Rate Municipal Obligations 91.5% Tax-Exempt Commercial Paper 5.6 Municipal Notes 2.9 </Table> <Table> <Caption> MATURITY SCHEDULE 1 - 30 Days 94.6% 31 - 60 Days 0.6 61 - 90 Days 1.9 91 - 120 Days -- 121+ Days 2.9 </Table> Data as of December 31, 2006. Subject to change daily. All percentages for portfolio composition and maturity schedule are as a percentage of total investments. These data are provided for informational purposes only and should not be deemed a recommendation to buy or sell the securities mentioned. Morgan Stanley is a full-service securities firm engaged in securities trading and brokerage activities, investment banking, research and analysis, financing and financial advisory services. 3 INVESTMENT STRATEGY THE FUND WILL INVEST IN HIGH QUALITY, SHORT-TERM SECURITIES THAT ARE NORMALLY MUNICIPAL OBLIGATIONS THAT PAY INTEREST EXEMPT FROM FEDERAL AND CALIFORNIA INCOME TAXES. THE FUND'S "INVESTMENT ADVISER," MORGAN STANLEY INVESTMENT ADVISORS INC., SEEKS TO MAINTAIN THE FUND'S SHARE PRICE AT $1.00. THE SHARE PRICE REMAINING STABLE AT $1.00 MEANS THAT THE FUND WOULD PRESERVE THE PRINCIPAL VALUE OF YOUR INVESTMENT. AN INVESTMENT IN THE FUND IS NOT INSURED OR GUARANTEED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION OR ANY OTHER GOVERNMENT AGENCY. ALTHOUGH THE FUND SEEKS TO PRESERVE THE VALUE OF YOUR INVESTMENT AT $1.00 PER SHARE, IT IS POSSIBLE TO LOSE MONEY BY INVESTING IN THE FUND. FOR MORE INFORMATION ABOUT PORTFOLIO HOLDINGS EACH MORGAN STANLEY FUND PROVIDES A COMPLETE SCHEDULE OF PORTFOLIO HOLDINGS IN ITS SEMIANNUAL AND ANNUAL REPORTS WITHIN 60 DAYS OF THE END OF THE FUND'S SECOND AND FOURTH FISCAL QUARTERS. THE SEMIANNUAL REPORTS AND THE ANNUAL REPORTS ARE FILED ELECTRONICALLY WITH THE SECURITIES AND EXCHANGE COMMISSION (SEC) ON FORM N-CSRS AND FORM N-CSR, RESPECTIVELY. MORGAN STANLEY ALSO DELIVERS THE SEMIANNUAL AND ANNUAL REPORTS TO FUND SHAREHOLDERS AND MAKES THESE REPORTS AVAILABLE ON ITS PUBLIC WEB SITE, WWW.MORGANSTANLEY.COM. EACH MORGAN STANLEY FUND ALSO FILES A COMPLETE SCHEDULE OF PORTFOLIO HOLDINGS WITH THE SEC FOR THE FUND'S FIRST AND THIRD FISCAL QUARTERS ON FORM N-Q. MORGAN STANLEY DOES NOT DELIVER THE REPORTS FOR THE FIRST AND THIRD FISCAL QUARTERS TO SHAREHOLDERS, NOR ARE THE REPORTS POSTED TO THE MORGAN STANLEY PUBLIC WEB SITE. YOU MAY, HOWEVER, OBTAIN THE FORM N-Q FILINGS (AS WELL AS THE FORM N-CSR AND N-CSRS FILINGS) BY ACCESSING THE SEC'S WEB SITE, HTTP://WWW.SEC.GOV. YOU MAY ALSO REVIEW AND COPY THEM AT THE SEC'S PUBLIC REFERENCE ROOM IN WASHINGTON, DC. INFORMATION ON THE OPERATION OF THE SEC'S PUBLIC REFERENCE ROOM MAY BE OBTAINED BY CALLING THE SEC AT (800) SEC-0330. YOU CAN ALSO REQUEST COPIES OF THESE MATERIALS, UPON PAYMENT OF A DUPLICATING FEE, BY ELECTRONIC REQUEST AT THE SEC'S E-MAIL ADDRESS (PUBLICINFO@SEC.GOV) OR BY WRITING THE PUBLIC REFERENCE SECTION OF THE SEC, WASHINGTON, DC 20549-0102. HOUSEHOLDING NOTICE TO REDUCE PRINTING AND MAILING COSTS, THE FUND ATTEMPTS TO ELIMINATE DUPLICATE MAILINGS TO THE SAME ADDRESS. THE FUND DELIVERS A SINGLE COPY OF CERTAIN SHAREHOLDER DOCUMENTS, INCLUDING SHAREHOLDER REPORTS, PROSPECTUSES AND PROXY MATERIALS, TO INVESTORS WITH THE SAME LAST NAME WHO RESIDE AT THE SAME ADDRESS. YOUR PARTICIPATION IN THIS PROGRAM WILL CONTINUE FOR AN UNLIMITED PERIOD OF TIME UNLESS YOU INSTRUCT US OTHERWISE. YOU CAN REQUEST MULTIPLE COPIES OF THESE DOCUMENTS BY CALLING (800) 350-6414, 8:00 A.M. TO 8:00 P.M., ET. ONCE OUR CUSTOMER SERVICE CENTER HAS RECEIVED YOUR INSTRUCTIONS, WE WILL BEGIN SENDING INDIVIDUAL COPIES FOR EACH ACCOUNT WITHIN 30 DAYS. 4 EXPENSE EXAMPLE As a shareholder of the Fund, you incur ongoing costs, including advisory fees; distribution and service (12b-1) fees; and other Fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period 07/01/06 - 12/31/06. ACTUAL EXPENSES The first line of the table below provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. HYPOTHETICAL EXAMPLE FOR COMPARISON PURPOSES The second line of the table below provides information about hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing cost of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the table are meant to highlight your ongoing costs only. Therefore, the second line of the table is useful in comparing ongoing costs, and will not help you determine the relative total cost of owning different funds that have transactional costs, such as sales charges (loads), and redemption fees, or exchange fees. <Table> <Caption> BEGINNING ENDING EXPENSES PAID ACCOUNT VALUE ACCOUNT VALUE DURING PERIOD * ------------- ------------- --------------- 07/01/06 - 07/01/06 12/31/06 12/31/06 ------------- ------------- --------------- Actual (1.45% return)....................................... $1,000.00 $1,014.50 $2.86 Hypothetical (5% annual return before expenses)............. $1,000.00 $1,022.09 $2.87 </Table> - ------------------ * Expenses are equal to the Fund's annualized expense ratio of 0.57% multiplied by the average account value over the period, multiplied by 182/365 (to reflect the one-half year period). 5 Active Assets California Tax-Free Trust PORTFOLIO OF INVESTMENTS - DECEMBER 31, 2006 (UNAUDITED) <Table> <Caption> PRINCIPAL AMOUNT IN COUPON DEMAND THOUSANDS RATE+ DATE* VALUE - ---------------------------------------------------------------------------------------------------------- California Tax-Exempt Short-Term Variable Rate Municipal Obligations (94.6%) ABAG Finance Authority for Nonprofit Corporations, $ 6,000 Elder Care Alliance of San Francisco Ser 2006 A........ 3.80% 01/08/07 $ 6,000,000 7,900 Episcopal Homes Foundation Ser 2000 COPs............... 3.77 01/08/07 7,900,000 6,000 Eskaton Village-Roseville Ser 2006..................... 3.84 01/08/07 6,000,000 5,280 Jewish Community Center Ser 2002....................... 3.92 01/02/07 5,280,000 6,100 Jewish Home of San Francisco Ser 2005.................. 3.92 01/02/07 6,100,000 5,000 Paragon Apartments Ser 2005 A (AMT).................... 3.90 01/08/07 5,000,000 2,600 Alameda-Contra Costa Schools Financing Authority, Ser M COPs................................................... 3.87 01/08/07 2,600,000 6,400 Anaheim, Ser 1993 COPs (Ambac)........................... 3.71 01/08/07 6,400,000 13,905 Anaheim Public Financing Authority, Distribution System ROCs II-R Ser 6021 (MBIA).............................. 3.91 01/08/07 13,905,000 Bay Area Toll Authority, 11,900 San Francisco Bay Area Toll Bridge 2006 Ser A-2 (XLCA)................................................. 3.80 01/08/07 11,900,000 6,400 San Francisco Bay Area Toll Bridge 2006 Ser B-2 (XLCA)................................................. 3.69 01/08/07 6,400,000 5,000 Beaumont Unified School District, School Facility Bridge Funding Ser 2006 COPs (FSA)............................ 3.73 01/08/07 5,000,000 20,800 Big Bear Lake, Southwest Gas Corp 1993 Ser A (AMT)....... 3.85 01/08/07 20,800,000 5,400 Butte-Glenn Community College District, Election of 2002 Ser B P-FLOATs PT-3042 (MBIA).......................... 3.92 01/08/07 5,400,000 California, 4,000 Economic Recovery Ser 2004 A Floater-TRs Ser L27....... 3.90 01/08/07 4,000,000 13,000 Economic Recovery Ser 2004 C-4......................... 3.92 01/02/07 13,000,000 12,000 Economic Recovery Ser 2004 C-11........................ 3.75 01/08/07 12,000,000 11,100 Economic Recovery Ser 2004 C-12 (XLCA)................. 3.72 01/08/07 11,100,000 8,800 Economic Recovery Ser 2004 C-13 (XLCA)................. 3.82 01/08/07 8,800,000 35,500 Economic Recovery Ser 2004 C-14 (XLCA)................. 3.73 01/08/07 35,500,000 15,700 Economic Recovery Ser 2004 C-18 (XLCA)................. 3.75 01/08/07 15,700,000 California, 7,000 Municipal CRVS Ser 2006-1005 (MBIA).................... 3.91 01/08/07 7,000,000 5,700 Municipal Securities Trust Receipts Ser 2001-JPMC3 (MBIA)................................................. 3.97 01/02/07 5,700,000 11,085 Ser 2003 PUTTERs Ser 1460.............................. 3.99 01/08/07 11,085,000 3,825 Ser 2004 A-9........................................... 3.79 01/08/07 3,825,000 19,800 Ser 2004 B-5........................................... 3.73 01/08/07 19,800,000 3,000 Ser 2004 PUTTERs Ser 1461.............................. 3.99 01/08/07 3,000,000 26,300 Ser 2005 B Subser B-1.................................. 3.73 01/08/07 26,300,000 1,240 Ser 2005 P-FLOATs PT-2622 (MBIA)....................... 3.92 01/08/07 1,240,000 California Department of Water Resources, 5,400 Power Supply Ser 2002 B Subser B-1..................... 3.92 01/02/07 5,400,000 7,350 Power Supply Ser 2002 C Subser C-3 (Ambac)............. 3.82 01/08/07 7,350,000 3,300 Power Supply Ser 2002 C Subser C-4..................... 3.84 01/08/07 3,300,000 9,900 Power Supply Ser 2002 C Subser C-7 (FSA)............... 3.75 01/08/07 9,900,000 </Table> 6 See Notes to Financial Statements Active Assets California Tax-Free Trust PORTFOLIO OF INVESTMENTS - DECEMBER 31, 2006 (UNAUDITED) continued <Table> <Caption> PRINCIPAL AMOUNT IN COUPON DEMAND THOUSANDS RATE+ DATE* VALUE - ---------------------------------------------------------------------------------------------------------- $20,875 Power Supply Ser 2002 C Subser C-10.................... 3.63% 01/08/07 $ 20,875,000 10,000 Power Supply Ser 2002 C Subser C-16.................... 3.79 01/08/07 10,000,000 6,000 Power Supply Ser 2002 C Subser C-18.................... 3.78 01/08/07 6,000,000 4,250 Power Supply Ser 2005 F Subser F-3..................... 3.92 01/02/07 4,250,000 5,000 Power Supply Ser 2005 F Subser G-2..................... 3.84 01/08/07 5,000,000 28,300 Power Supply Ser 2005 G Subser G-14 (FGIC)............. 3.84 01/08/07 28,300,000 California Educational Facilities Authority, 29,550 California Institute of Technology Ser 1994 & 2006 Ser A...................................................... 3.76 01/08/07 29,550,000 5,465 California Lutheran University Ser 2004 A.............. 3.82 01/08/07 5,465,000 6,800 University of San Francisco Ser 2003................... 3.77 01/08/07 6,800,000 California Health Facilities Financing Authority, 5,600 Adventist Health System/West 1998 Ser B (MBIA)......... 3.92 01/02/07 5,600,000 10,000 Catholic Healthcare West Ser 2004 K.................... 3.80 01/08/07 10,000,000 14,125 Catholic Healthcare West Ser 2005 H.................... 3.73 01/08/07 14,125,000 30,000 Kaiser Permanente Ser 2006 C........................... 3.77 01/08/07 30,000,000 24,985 Northern California Presbyterian Homes & Services Ser 2004................................................... 3.73 01/08/07 24,985,000 900 Sisters of Charity of Leavenworth Health System Ser 2003................................................... 3.82 01/08/07 900,000 California Housing Finance Agency, 10,600 Home Mortgage 2000 Ser U (MBIA) (AMT).................. 3.87 01/08/07 10,600,000 1,500 Home Mortgage 2002 Ser M (AMT)......................... 3.92 01/02/07 1,500,000 25,000 Home Mortgage 2003 Ser F (FSA) (AMT)................... 3.91 01/08/07 25,000,000 7,860 California Infrastructure & Economic Development Bank, Asian Art Museum Foundation Ser 2005 (MBIA)............ 3.92 01/02/07 7,860,000 5,890 California State University, Systemwide Ser 2005 A PUTTERs Ser 1320 (Ambac)............................... 3.91 01/08/07 5,890,000 California Statewide Communities Development Authority, 5,000 American Baptist Homes of the West Ser 2006............ 3.77 01/08/07 5,000,000 6,000 Chabad of California Ser 2004.......................... 3.78 01/08/07 6,000,000 3,200 House Ear Institute 1993 Ser A COPs.................... 3.92 01/02/07 3,200,000 9,250 Irvine Apartment Communities Ser W-2 (AMT)............. 3.87 01/08/07 9,250,000 36,700 Kaiser Permanente Ser 2004 J & L....................... 3.77 01/08/07 36,700,000 7,200 Maple Square Apartment Homes 2004 Ser AA (AMT)......... 3.90 01/08/07 7,200,000 6,500 Mariners Pointe Apartments 2006 Ser A.................. 3.75 01/08/07 6,500,000 10,140 Multifamily Housing Martin Luther Tower 2005 Ser D (AMT).................................................. 3.87 01/08/07 10,140,000 4,900 The California Endowment Ser 2003 PUTTERs Ser 1425..... 3.91 01/08/07 4,900,000 12,000 University of San Diego, Ser 2005...................... 3.88 01/08/07 12,000,000 4,200 YMCA of East Bay Ser 2006.............................. 3.73 01/08/07 4,200,000 5,240 California Transit Finance Authority, Ser 1997 (FSA)..... 3.84 01/08/07 5,240,000 6,765 Cerritos Community College District, Ser 2005 P-FLOATs PT-2934 (Ambac)............................... 3.92 01/08/07 6,765,000 5,500 Chino Redevelopment Agency, Tax Allocation CRVS Ser 2006-1009 (Ambac).................................. 3.91 01/08/07 5,500,000 </Table> 7 See Notes to Financial Statements Active Assets California Tax-Free Trust PORTFOLIO OF INVESTMENTS - DECEMBER 31, 2006 (UNAUDITED) continued <Table> <Caption> PRINCIPAL AMOUNT IN COUPON DEMAND THOUSANDS RATE+ DATE* VALUE - ---------------------------------------------------------------------------------------------------------- $ 6,700 Corona-Norco Unified School District, Ser 2005 COPs...... 3.73% 01/08/07 $ 6,700,000 East Bay Municipal Utility District, 17,290 Wastewater Sub Ser 2003 B (XLCA)....................... 3.70 01/08/07 17,290,000 19,835 Water System Sub Refg Ser 2002 B (FSA)................. 3.70 01/08/07 19,835,000 3,000 East Side Union High School District, Santa Clara County Ser 2006 B MERLOTs Ser B 28 (MBIA)..................... 3.93 01/08/07 3,000,000 4,510 Eastern Municipal Water District, Water & Sewer Ser 1993 B COPs (FGIC).......................................... 3.73 01/08/07 4,510,000 4,750 El Rancho Unified School District, Ser 2003 A PUTTERs Ser 807T (FGIC)..................... 3.91 01/08/07 4,750,000 21,700 Fremont, Creekside Village Multifamily Ser 1985 D........ 3.72 01/08/07 21,700,000 Fresno, 7,345 Multifamily Housing Heron Pointe Apartments 2001 Ser A...................................................... 3.75 01/08/07 7,345,000 20,800 Sewer System Sublien Ser 2000 A (FGIC)................. 3.73 01/08/07 20,800,000 10,800 Glendale Financing Authority, 2000 Police Building COPs................................................... 3.82 01/08/07 10,800,000 5,000 Golden State Tobacco Securitization Corporation, Ser 2005 A ROCs II-R Ser 565 (FGIC)............................. 3.91 01/08/07 5,000,000 2,400 Grant Joint Union High School District, School Facility Bridge Funding Ser 2005 COPs (FSA)..................... 3.73 01/08/07 2,400,000 2,490 Greenfield Redevelopment Agency, Tax Allocation Ser 2006 PUTTERs Ser 1595 (Ambac)...................... 3.91 01/08/07 2,490,000 6,225 Hacienda-La Puenta Unified School District, 2000 Ser B P-FLOATs PT-1988 (FSA)...................... 3.92 01/08/07 6,225,000 4,500 Hemet Unified School District, Ser 2006 COPs (Ambac)..... 3.77 01/08/07 4,500,000 6,600 Hillsborough, Water & Sewer System Ser 2006 A COPs....... 3.82 01/08/07 6,600,000 17,500 Irvine Assessment District No 05-21, Improvement Bond Act 1915 Ser 2006 A........................................ 3.88 01/02/07 17,500,000 12,180 Lancaster Redevelopment Agency, Multifamily Sunset Projects Sub Ser 2003 B Floater-TRs Ser 2003 F 12J..... 3.92 01/08/07 12,180,000 9,745 Long Beach, Harbor PUTTERs Ser 444 (MBIA) (AMT).......... 3.91 01/08/07 9,745,000 Los Angeles, 11,000 Multifamily Fountain Park Ser 1999 P (AMT)............. 3.88 01/08/07 11,000,000 11,005 Wastewater System Ser 2001 A (FGIC).................... 3.73 01/08/07 11,005,000 21,395 Wastewater System Ser 2001 B (FGIC).................... 3.80 01/08/07 21,395,000 5,720 Wastewater System Ser 2006 A (XLCA).................... 3.84 01/08/07 5,720,000 19,300 Los Angeles Community Redevelopment Agency, Grand Promenade Ser 2002..................................... 3.75 01/08/07 19,300,000 6,000 Los Angeles County Housing Authority, Multifamily Malibu Meadows 1998 Ser B..................................... 3.75 01/08/07 6,000,000 6,000 Los Angeles County Metropolitan Transportation Authority, Prop C Sales Tax 2nd Ser 2004-A Eagle #20040046 (MBIA)................................................. 3.92 01/08/07 6,000,000 </Table> 8 See Notes to Financial Statements Active Assets California Tax-Free Trust PORTFOLIO OF INVESTMENTS - DECEMBER 31, 2006 (UNAUDITED) continued <Table> <Caption> PRINCIPAL AMOUNT IN COUPON DEMAND THOUSANDS RATE+ DATE* VALUE - ---------------------------------------------------------------------------------------------------------- $ 9,000 Los Angeles Department of Airports, Los Angeles International Airport Sub Ser 2002 C-1................. 3.73% 01/08/07 $ 9,000,000 Los Angeles Department of Water & Power, 16,900 Power System 2001 Ser B Subser B-1..................... 3.75 01/08/07 16,900,000 7,000 Power System 2001 Ser B Subser B-5..................... 3.82 01/08/07 7,000,000 9,000 Power System 2001 Ser B Subser B-6..................... 3.90 01/02/07 9,000,000 8,000 Power System 2002 Ser A Subser A-8..................... 3.79 01/08/07 8,000,000 8,300 Water System 2001 Ser B Subser B-1..................... 3.82 01/08/07 8,300,000 16,495 Los Angeles Housing Authority, Multifamily 2004 Ser A.... 3.75 01/08/07 16,495,000 10,930 Los Angeles Unified School District, P-FLOATs PT-1855 (FSA).................................................. 3.92 01/08/07 10,930,000 14,400 Menlo Park Community Development Agency, Las Pulgas Community Development Tax Allocation Ser 2006 (Ambac)................................................ 3.85 01/02/07 14,400,000 Metropolitan Water District of Southern California, 8,200 Water 1999 Ser B....................................... 3.71 01/08/07 8,200,000 8,000 Water 1999 Ser C....................................... 3.76 01/08/07 8,000,000 22,400 Waterworks 1996 Ser A (Ambac) & 2005 Ser B-2........... 3.70 01/08/07 22,400,000 10,250 Waterworks 2002 Ser A.................................. 3.80 01/08/07 10,250,000 5,690 Moorpark Unified School District, Refg Ser 2005 P-FLOATs PT-2738 (FSA)................................. 3.92 01/08/07 5,690,000 13,300 Mountain View, Villa Mariposa Multifamily 1985 Ser A..... 3.80 01/08/07 13,300,000 12,410 Northern California Power Agency, Hydroelectric No 1 Ser 2002 B (MBIA)...................................... 3.73 01/08/07 12,410,000 12,760 Northern California Transmission Agency, California-Oregon Transmission Refg 2002 Ser A (FSA)... 3.75 01/08/07 12,760,000 35,100 Oakland-Alameda County Coliseum Authority, Oakland Coliseum 2000 Refg Ser C-2 (DD)........................ 3.75 01/08/07 35,100,000 16,000 Oakland Joint Powers Financing Authority, Fruitvale Transit Village Ser 2001 A............................. 3.73 01/08/07 16,000,000 14,900 Orange County, Park Place Apartments 1989 Issue A (AMT).................................................. 3.84 01/08/07 14,900,000 9,130 Orange County Housing Authority, Oasis Martinique Refg 1998 Issue I...................................... 3.76 01/08/07 9,130,000 600 Orange County Sanitation District, Ser 2000 B COPs....... 3.83 01/02/07 600,000 12,000 Pasadena, City Hall & Park Improvement Ser 2003 COPs (Ambac)................................................ 3.77 01/08/07 12,000,000 4,250 Pittsburg Redevelopment Agency, Los Medanos Community Development Sub 2004 Ser A (Ambac)..................... 3.85 01/02/07 4,250,000 Pleasanton, 6,000 Assisted Living Facility Ser 2005...................... 3.78 01/08/07 6,000,000 5,850 Greenbriar Bernal Apartments Ser 2001 A (AMT).......... 3.87 01/08/07 5,850,000 9,500 Pomona Redevelopment Agency, Park & Plaza Apartments Ser 1998 A............................................. 3.78 01/08/07 9,500,000 3,800 Poway Unified School District, Ser 2004 COPs (FSA)....... 3.73 01/08/07 3,800,000 </Table> 9 See Notes to Financial Statements Active Assets California Tax-Free Trust PORTFOLIO OF INVESTMENTS - DECEMBER 31, 2006 (UNAUDITED) continued <Table> <Caption> PRINCIPAL AMOUNT IN COUPON DEMAND THOUSANDS RATE+ DATE* VALUE - ---------------------------------------------------------------------------------------------------------- $17,500 Rancho Water District Financing Authority, Ser 2001 B (FGIC)................................................. 3.70% 01/08/07 $ 17,500,000 Riverside County, 10,000 1985 Ser A COPs........................................ 3.80 01/08/07 10,000,000 9,580 2005 Ser A & B COPs P-FLOATs PT-2704 (FGIC)............ 3.92 01/08/07 9,580,000 Roaring Fork Municipal Products, 7,845 California Economic Recovery Class A Certificates Ser 2004-4 (FGIC)........................................ 3.83 01/08/07 7,845,000 8,440 San Diego Community College District Class A Certificates Ser 2005-22 (FSA)....................... 3.83 01/08/07 8,440,000 7,335 San Diego Housing Authority Market Street Square Apartments 1996 Issue C Class A Certificates Ser 2006-23.............................................. 3.83 01/08/07 7,335,000 4,400 Roseville, Electric System Ser 2005 A COPs P-FLOATs PT-3021 (FGIC)......................................... 3.92 01/08/07 4,400,000 5,283 Sacramento City Financing Authority, Tax Allocation Merged Downtown & Oak Park Ser 2005 A TOCs Ser 2006 Z-3 (FGIC)................................................. 3.97 01/08/07 5,283,000 1,000 Sacramento County Housing Authority, Seasons at Winter 2004 Ser C-2........................................... 3.73 01/08/07 1,000,000 7,800 San Bernardino County, Medical Center Financing Ser 1998 COPs (MBIA)............................................ 3.66 01/08/07 7,800,000 8,000 San Bernardino County Housing Authority, Multifamily Raintree Apartments Ser 2005 A......................... 3.75 01/08/07 8,000,000 9,350 San Diego County, Ser 2004 COPs.......................... 3.75 01/08/07 9,350,000 6,655 San Diego Unified Port District, 2004 Ser B P-FLOATs PT-2409 (MBIA)......................................... 3.92 01/08/07 6,655,000 1,735 San Diego Unified School District, 1998 Ser E-1 ROCs II-R Ser 1067 (MBIA)........................................ 3.91 01/08/07 1,735,000 11,000 San Francisco City & County Airport Commission, 2006 Second Ser 33-I (XLCA)................................. 3.77 01/08/07 11,000,000 8,920 San Francisco City & County Finance Corporation, Moscone Center Ser 2004 P-FLOATs PT-2249 (Ambac)............... 3.92 01/08/07 8,920,000 1,995 San Francisco City & County Public Utilities Commission, Water Ser 2006 A ROCs II-R Ser 6085 (FSA).............. 3.91 01/08/07 1,995,000 San Francisco City & County Redevelopment Agency, 21,000 Bayside Village Multifamily Ser 1985 A................. 3.77 01/08/07 21,000,000 6,000 Multifamily Mercy Terrace Ser 2005 A................... 3.75 01/08/07 6,000,000 3,400 San Joaquin Hills Transportation Corridor Agency, Toll Road Ser 1997 A Floaters Ser 2006-90TPZ (MBIA) & Ser 2006-91TPZ (MBIA).............................. 3.94 01/08/07 3,400,000 4,850 San Jose Redevelopment Agency, Merged Area 1996 Ser A.... 3.71 01/08/07 4,850,000 11,830 San Jose-Santa Clara Clean Water Financing Authority, Sewer Ser 2005 B (FSA)................................. 3.71 01/08/07 11,830,000 11,220 San Leandro, Multifamily Carlton Plaza Ser 1997 A (AMT).................................................. 3.88 01/08/07 11,220,000 </Table> 10 See Notes to Financial Statements Active Assets California Tax-Free Trust PORTFOLIO OF INVESTMENTS - DECEMBER 31, 2006 (UNAUDITED) continued <Table> <Caption> PRINCIPAL AMOUNT IN COUPON DEMAND THOUSANDS RATE+ DATE* VALUE - ---------------------------------------------------------------------------------------------------------- $ 7,605 San Marcos Public Facilities Authority, Tax Increment Pass-Through Ser 2006 A ROCs II-R Ser 514 (Ambac)...... 3.91% 01/08/07 $ 7,605,000 Santa Clara, 3,600 Electric Ser 1985 C (Ambac)............................ 3.73 01/08/07 3,600,000 12,400 Multifamily Briarwood Apartments Ser 1996 B............ 3.75 01/08/07 12,400,000 7,200 Multifamily The Grove Garden Apartments Ser 1997 A..... 3.75 01/08/07 7,200,000 7,300 Santa Clara County-El Camino Hospital District Hospital Facilities Authority, Valley Medical Center 1985 Ser A...................................................... 3.80 01/08/07 7,300,000 15,800 Santa Clara Valley Transportation Authority, Sales Tax Ser 2005 B (Ambac)..................................... 3.72 01/08/07 15,800,000 2,200 Snowline Joint Unified School District, Ser 2005 COPs (FSA).................................................. 3.73 01/08/07 2,200,000 Southern California Public Power Authority, 14,350 Transmission 1991 Refg Ser (Ambac) (DD)................ 3.72 01/08/07 14,350,000 1,300 Transmission Refg Ser 2001 A (FSA)..................... 3.71 01/08/07 1,300,000 4,205 Turlock Irrigation District, Ser 1988 A.................. 3.82 01/08/07 4,205,000 9,400 Vallejo Housing Authority, Multifamily Housing Crow-Western Phase II Ser 1985 C....................... 3.81 01/08/07 9,400,000 16,000 Vernon Natural Gas Financing Authority, Vernon Gas Ser 2006 B (MBIA).......................................... 3.72 01/08/07 16,000,000 5,260 WaterReuse Finance Authority, Ser 1998 (FSA)............. 3.84 01/08/07 5,260,000 1,990 Yucaipa Valley Water District, Water System Ser 2004 COPs ROCs II-R Ser 2130 (MBIA).............................. 3.91 01/08/07 1,990,000 -------------- Total California Tax-Exempt Short-Term Variable Rate Municipal Obligations (Cost $1,555,683,000)....................................................... 1,555,683,000 -------------- </Table> <Table> <Caption> YIELD TO MATURITY COUPON MATURITY ON DATE OF RATE DATE PURCHASE ------ -------- ---------- California Tax-Exempt Commercial Paper (5.8%) 10,000 California, Ser 1996....................... 3.49% 01/11/07 3.49% 10,000,000 10,000 California Educational Facilities Authority, Stanford University Ser 2003..................................... 3.44 02/07/07 3.44 10,000,000 4,289 California State University Institute, Ser A........................................ 3.43 01/10/07 3.43 4,289,000 8,000 Chino Basin Financing Authority, Inland Empire Utilities Agency Ser 2006......... 3.33 01/17/07 3.33 8,000,000 10,000 East Bay Municipal Utility District, Water Ser 1998................................. 3.50 01/18/07 3.50 10,000,000 10,000 Los Angeles Department of Water & Power, Power System............................. 3.43 03/01/07 3.43 10,000,000 </Table> 11 See Notes to Financial Statements Active Assets California Tax-Free Trust PORTFOLIO OF INVESTMENTS - DECEMBER 31, 2006 (UNAUDITED) continued <Table> <Caption> YIELD TO PRINCIPAL MATURITY AMOUNT IN COUPON MATURITY ON DATE OF THOUSANDS RATE DATE PURCHASE VALUE - --------------------------------------------------------------------------------------------------------- Riverside County, $ 5,000 Teeter Obligation 2005 Ser B-1........... 3.43% 01/10/07 3.43% $ 5,000,000 5,000 Teeter Obligation 2005 Ser B-1........... 3.43 01/16/07 3.43 5,000,000 11,500 San Diego County Water Authority, Ser 1.... 3.53 01/09/07 3.53 11,500,000 4,000 San Francisco County Transportation Authority, 2004 Ser A.................... 3.45 03/14/07 3.45 4,000,000 18,000 University of California Regents, Ser A.... 3.42 03/05/07 3.42 18,000,000 -------------- Total California Tax-Exempt Commercial Paper (Cost $95,789,000)......................................................... 95,789,000 -------------- California Tax-Exempt Short-Term Municipal Notes (3.0%) 17,200 California, Ser 2006-2007 RANs, dtd 10/03/06................................. 4.50 06/29/07 3.45 17,286,842 32,000 Bay Area Infrastructure Financing Authority, State Payment Acceleration Notes Ser 2006, dtd 12/14/06............................. 4.00 08/01/07 3.42 32,105,697 -------------- Total California Tax-Exempt Short-Term Municipal Notes (Cost $49,392,539)......................................................... 49,392,539 -------------- Total Investments (Cost $1,700,864,539) (a) (b)............... 103.4% 1,700,864,539 Liabilities in Excess of Other Assets......................... (3.4) (56,171,514) ----- -------------- Net Assets.................................................... 100.0% $1,644,693,025 ===== ============== </Table> 12 See Notes to Financial Statements Active Assets California Tax-Free Trust PORTFOLIO OF INVESTMENTS - DECEMBER 31, 2006 (UNAUDITED) continued - --------------------- <Table> AMT Alternative Minimum Tax. COPs Certificates of Participation. CRVS Custodial Residual & Variable Securities. DD A portion of this security has been purchased on a delayed delivery basis. Floater-TRs Floating Rate Trust Receipts. MERLOTs Municipal Exempt Receipts-Liquidity Option Tender. P-FLOATs Puttable Floating Option Tax-Exempt Receipts. PUTTERs Puttable Tax-Exempt Receipts. RANs Revenue Anticipation Notes. ROCs Reset Option Certificates. TOCs Tender Option Certificates. + Rate shown is the rate in effect at December 31, 2006. * Date on which the principal amount can be recovered through demand. (a) Securities have been designated as collateral in an amount equal to $25,401,916 in connection with the purchase of delayed delivery securities. (b) Cost is the same for federal income tax purposes. Bond Insurance: - --------------- Ambac Ambac Assurance Corporation. FGIC Financial Guaranty Insurance Company. FSA Financial Security Assurance Inc. MBIA Municipal Bond Investors Assurance Corporation. XLCA XL Capital Assurance Inc. </Table> See Notes to Financial Statements 13 Active Assets California Tax-Free Trust FINANCIAL STATEMENTS Statement of Assets and Liabilities December 31, 2006 (unaudited) <Table> Assets: Investments in securities, at value (cost $1,700,864,539)..................................... $1,700,864,539 Cash........................................................ 69,908 Interest receivable......................................... 7,227,693 Prepaid expenses and other assets........................... 41,226 -------------- Total Assets............................................ 1,708,203,366 -------------- Liabilities: Payable for: Investments purchased................................... 62,705,800 Investment advisory fee................................. 467,739 Distribution fee........................................ 130,361 Administration fee...................................... 65,181 Shares of beneficial interest redeemed.................. 8,077 Transfer agent fee...................................... 199 Accrued expenses and other payables......................... 132,984 -------------- Total Liabilities....................................... 63,510,341 -------------- Net Assets.............................................. $1,644,693,025 ============== Composition of Net Assets: Paid-in-capital............................................. $1,644,669,373 Accumulated undistributed net investment income............. 5,607 Accumulated net realized gain............................... 18,045 -------------- Net Assets.............................................. $1,644,693,025 ============== Net Asset Value Per Share 1,644,650,047 shares outstanding (unlimited shares authorized of $.01 par value)............................... $1.00 ============== </Table> See Notes to Financial Statements 14 Active Assets California Tax-Free Trust FINANCIAL STATEMENTS continued Statement of Operations For the six months ended December 31, 2006 (unaudited) <Table> Net Investment Income: Interest Income............................................. $25,675,638 ----------- Expenses Investment advisory fee..................................... 2,721,260 Distribution fee............................................ 741,902 Administration fee.......................................... 370,951 Transfer agent fees and expenses............................ 133,741 Shareholder reports and notices............................. 92,630 Registration fees........................................... 43,157 Professional fees........................................... 33,616 Custodian fees.............................................. 32,001 Trustees' fees and expenses................................. 10,246 Other....................................................... 43,116 ----------- Total Expenses.......................................... 4,222,620 Less: expense offset........................................ (32,236) ----------- Net Expenses............................................ 4,190,384 ----------- Net Investment Income................................... 21,485,254 Net Realized Gain....................................... 2,904 ----------- Net Increase................................................ $21,488,158 =========== </Table> See Notes to Financial Statements 15 Active Assets California Tax-Free Trust FINANCIAL STATEMENTS continued Statements of Changes in Net Assets <Table> <Caption> FOR THE SIX FOR THE YEAR MONTHS ENDED ENDED DECEMBER 31, 2006 JUNE 30, 2006 ----------------- -------------- (unaudited) Increase (Decrease) in Net Assets: Operations: Net investment income....................................... $ 21,485,254 $ 25,026,325 Net realized gain........................................... 2,904 15,141 -------------- -------------- Net Increase............................................ 21,488,158 25,041,466 Dividends to shareholders from net investment income........ (21,484,784) (25,026,145) Net increase from transactions in shares of beneficial interest.................................................. 327,685,911 612,697,317 -------------- -------------- Net Increase............................................ 327,689,285 612,712,638 Net Assets: Beginning of period......................................... 1,317,003,740 704,291,102 -------------- -------------- End of Period (Including accumulated undistributed net investment income of $5,607 and $5,137, respectively)......................... $1,644,693,025 $1,317,003,740 ============== ============== </Table> See Notes to Financial Statements 16 Active Assets California Tax-Free Trust NOTES TO FINANCIAL STATEMENTS - DECEMBER 31, 2006 (UNAUDITED) 1. Organization and Accounting Policies Active Assets California Tax-Free Trust (the "Fund") is registered under the Investment Company Act of 1940, as amended (the "Act"), as a diversified, open-end management investment company. The Fund's investment objective is to provide a high level of daily income which is exempt from federal and California income tax consistent with stability of principal and liquidity. The Fund was organized as a Massachusetts business trust on July 10, 1991 and commenced operations on November 12, 1991. The following is a summary of significant accounting policies: A. Valuation of Investments -- Portfolio securities are valued at amortized cost, which approximates market value, in accordance with Rule 2a-7 under the Act . B. Accounting for Investments -- Security transactions are accounted for on the trade date (date the order to buy or sell is executed). Realized gains and losses on security transactions are determined by the identified cost method. Discounts are accreted and premiums are amortized over the life of the respective securities. Interest income is accrued daily. C. Federal Income Tax Policy -- It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute substantially all of its taxable and nontaxable income to its shareholders. Accordingly, no federal income tax provision is required. D. Dividends and Distributions to Shareholders -- The Fund records dividends and distributions to shareholders as of the close of each business day. E. Use of Estimates -- The preparation of financial statements in accordance with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts and disclosures. Actual results could differ from those estimates. 2. Investment Advisory/Administration Agreements Pursuant to an Investment Advisory Agreement with Morgan Stanley Investment Advisors Inc. (the "Investment Adviser"), the Fund pays the Investment Adviser an advisory fee, accrued daily and payable monthly, by applying the following annual rates to the net assets of the Fund determined as of the close of each business day: 0.45% to the portion of the daily net assets not exceeding $500 million; 0.375% to the portion of the daily net assets exceeding $500 million but not exceeding $750 million; 0.325% to the portion of the daily net assets exceeding $750 million but not exceeding $1 billion; 0.30% to the portion of the daily net assets exceeding $1 billion but not exceeding $1.5 billion; 0.275% to the portion of the daily net assets exceeding $1.5 billion but not exceeding $2 billion; 0.25% to the portion of the daily net assets exceeding $2 billion but not 17 Active Assets California Tax-Free Trust NOTES TO FINANCIAL STATEMENTS - DECEMBER 31, 2006 (UNAUDITED) continued exceeding $2.5 billion; 0.225% to the portion of the daily net assets exceeding $2.5 billion but not exceeding $3 billion; and 0.20% to the portion of the daily net assets exceeding $3 billion. Pursuant to an Administration Agreement with Morgan Stanley Services Company Inc. (the "Administrator"), an affiliate of the Investment Adviser, the Fund pays an administration fee, accrued daily and payable monthly, by applying the annual rate of 0.05% to the Fund's daily net assets. 3. Plan of Distribution Morgan Stanley Distributors Inc. (the "Distributor"), an affiliate of the Investment Adviser and Administrator, is the distributor of the Fund's shares and in accordance with a Plan of Distribution (the "Plan") pursuant to Rule 12b-1 under the Act, finances certain expenses in connection with the promotion of sales of Fund shares. Reimbursements for these expenses are made in monthly payments by the Fund to the Distributor, which will in no event exceed an amount equal to a payment at the annual rate of 0.15% of the Fund's average daily net assets during the month. Expenses incurred by the Distributor pursuant to the Plan in any fiscal year will not be reimbursed by the Fund through payments accrued in any subsequent fiscal year. For the six months ended December 31, 2006, the distribution fee was accrued at the annual rate of 0.10%. 4. Security Transactions and Transactions with Affiliates The cost of purchases and proceeds from sales/maturities of portfolio securities for the six months ended December 31, 2006, aggregated $1,798,019,898 and $1,473,519,904, respectively. Morgan Stanley Trust, an affiliate of the Investment Adviser, Administrator and Distributor, is the Fund's transfer agent. The Fund has an unfunded noncontributory defined benefit pension plan covering certain independent Trustees of the Fund who will have served as independent Trustees for at least five years at the time of retirement. Benefits under this plan are based on factors which include years of service and compensation. The Trustees voted to close the plan to new participants and eliminate the future benefits growth due to increases to compensation after July 31, 2003. Aggregate pension costs for the six months ended December 31, 2006, included in Trustees' fees and expenses in the Statement of Operations amounted to $893. At December 31, 2006, the Fund had an accrued pension liability of $56,703 which is included in accrued expenses in the Statement of Assets and Liabilities. 18 Active Assets California Tax-Free Trust NOTES TO FINANCIAL STATEMENTS - DECEMBER 31, 2006 (UNAUDITED) continued The Fund has an unfunded Deferred Compensation Plan (the "Compensation Plan") which allows each independent Trustee to defer payment of all, or a portion, of the fees he or she receives for serving on the Board of Trustees. Each eligible Trustee generally may elect to have the deferred amounts credited with a return equal to the total return on one or more of the Morgan Stanley funds that are offered as investment options under the Compensation Plan. Appreciation/depreciation and distributions received from these investments are recorded with an offsetting increase/decrease in the deferred compensation obligation and do not affect the net asset value of the Fund. 5. Shares of Beneficial Interest Transactions in shares of beneficial interest, at $1.00 per share, were as follows: <Table> <Caption> FOR THE SIX FOR THE YEAR MONTHS ENDED ENDED DECEMBER 31, 2006 JUNE 30, 2006 ----------------- -------------- (unaudited) Shares sold................................................. 3,793,186,941 5,547,616,118 Shares issued in reinvestment of dividends.................. 21,484,784 25,026,145 -------------- -------------- 3,814,671,725 5,572,642,263 Shares redeemed............................................. (3,486,985,814) (4,959,944,946) -------------- -------------- Net increase in shares outstanding.......................... 327,685,911 612,697,317 ============== ============== </Table> 6. Expense Offset The expense offset represents a reduction of the fees and expenses for interest earned on cash balances maintained by the Fund with the transfer agent and custodian. 7. New Accounting Pronouncements In July 2006, the Financial Accounting Standards Board (FASB) issued Interpretation 48, Accounting for Uncertainty in Income Taxes -- an interpretation of FASB Statement 109 (FIN 48). FIN 48 clarifies the accounting for income taxes by prescribing the minimum recognition threshold a tax position must meet before being recognized in the financial statements. FIN 48 is effective for fiscal years beginning after December 15, 2006 and is to be applied to all open tax years as of the effective date. Recent SEC guidance allows implementing FIN 48 in the fund NAV calculations on the fund's last NAV calculation in the first required financial statement period. As a result, the Fund will incorporate FIN 48 in its annual report on June 30, 2007. The impact to the Fund's financial statements, if any, is currently being assessed. 19 Active Assets California Tax-Free Trust NOTES TO FINANCIAL STATEMENTS - DECEMBER 31, 2006 (UNAUDITED) continued In addition, in September 2006, Statement of Financial Accounting Standards No. 157, Fair Value Measurements (SFAS 157), was issued and is effective for fiscal years beginning after November 15, 2007. SFAS 157 defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. Management is currently evaluating the impact the adoption of SFAS 157 will have on the Fund's financial statement disclosures. 20 Active Assets California Tax-Free Trust FINANCIAL HIGHLIGHTS Selected ratios and per share data for a share of beneficial interest outstanding throughout each period: <Table> <Caption> FOR THE SIX FOR THE YEAR ENDED JUNE 30, MONTHS ENDED --------------------------------------------------------------- DECEMBER 2006 2006 2005 2004 2003 2002 ----------------- ----------- --------- --------- --------- --------- (unaudited) Selected Per Share Data: Net asset value, beginning of period.............................. $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 -------- ---------- -------- -------- -------- -------- Net income from investment operations.......................... 0.014 0.023 0.012 0.003 0.006 0.011 Less dividends from net investment income.............................. (0.014) (0.023) (0.012) (0.003) (0.006) (0.011) -------- ---------- -------- -------- -------- -------- Net asset value, end of period....... $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 ======== ========== ======== ======== ======== ======== Total Return......................... 1.45%(1) 2.37% 1.17% 0.35% 0.63% 1.15% Ratios to Average Net Assets: Total expenses (before expense offset)............................. 0.57%(2) 0.59%(3) 0.62%(3) 0.61% 0.60% 0.60% Net investment income................ 2.90%(2) 2.42% 1.16% 0.35% 0.63% 1.14% Supplemental Data: Net assets, end of period, in thousands........................... $1,644,693 $1,317,004 $704,291 $687,800 $762,448 $762,656 </Table> - --------------------- <Table> (1) Not annualized. (2) Annualized. (3) Does not reflect the effect of expense offset of 0.01%. </Table> 21 See Notes to Financial Statements Active Assets California Tax-Free Trust RESULTS OF SPECIAL SHAREHOLDER MEETING (UNAUDITED) On August 1, 2006, a Special Meeting of Shareholders of the Fund was scheduled in order to vote on the proposals set forth below. The proposals failed to achieve the quorum necessary in order to hold the meeting, and, therefore, the meeting was adjourned until several times, most recently to November 30, 2006 to permit further solicitation of proxies. The meeting was held on November 30, 2006 and the voting results with respect to these proposals were as follows: (1) Election of Trustees: <Table> <Caption> FOR WITHHOLD ABSTAIN BNV* ----------------------------------------------------- Frank L. Bowman.......................................... 627,269,189 27,109,726 481,777 0 Kathleen A. Dennis....................................... 627,109,412 27,269,503 481,777 0 James F. Higgins......................................... 625,047,451 29,331,464 481,777 0 Joseph J. Kearns......................................... 625,344,793 29,034,122 481,777 0 Michael F. Klein......................................... 626,955,204 27,423,711 481,777 0 W. Allen Reed............................................ 626,675,378 27,703,537 481,777 0 Fergus Reid.............................................. 625,437,844 28,941,071 481,777 0 </Table> The following Trustees were not standing for reelection at this meeting: Michael Bozic, Dr. Manuel H. Johnson and Michael E. Nugent. (2) Elimination of certain fundamental investment restrictions: <Table> <Caption> FOR AGAINST ABSTAIN BNV* ----------------------------------------------------- Elimination of the fundamental policy restricting the Fund's ability to pledge assets........................ 587,279,124 31,026,706 36,554,862 0 Elimination of the fundamental policy restricting purchases of securities on margin...................... 586,484,073 31,292,087 37,084,532 0 Elimination of the fundamental policy prohibiting investments in oil, gas, and other types of minerals or mineral leases......................................... 587,092,146 30,473,997 37,294,549 0 Elimination of the fundamental policy prohibiting or restricting the purchase of securities of issuers in which Trustees or Officers have an interest............ 596,404,026 27,240,981 31,215,685 0 Elimination of the fundamental policy prohibiting investments for purposes of exercising control......... 596,775,894 27,378,186 30,706,612 0 Elimination of the fundamental policy prohibiting the purchase of common stocks and other instrument......... 594,195,709 27,898,532 32,766,451 0 </Table> 22 Active Assets California Tax-Free Trust RESULTS OF SPECIAL SHAREHOLDER MEETING (UNAUDITED) continued (3) Modify certain fundamental investment restrictions: <Table> <Caption> FOR AGAINST ABSTAIN BNV* ----------------------------------------------------- Modify fundamental policy regarding diversification...... 593,981,031 27,839,051 33,040,610 0 Modify fundamental policy regarding borrowing money...... 592,048,230 30,804,054 32,008,408 0 Modify fundamental policy regarding loans................ 591,885,778 31,872,335 31,102,579 0 Modify fundamental policy regarding investment in commodities, commodity contracts and futures contracts.............................................. 592,019,448 30,765,679 32,075,565 0 Modify fundamental policy regarding issuance of senior securities............................................. 595,980,078 27,667,355 31,213,259 0 </Table> (4) Reclassify certain fundamental policies as non-fundamental policies: <Table> <Caption> FOR AGAINST ABSTAIN BNV* ----------------------------------------------------- Reclassification as non-fundamental the fundamental policy regarding the short sale of securities.......... 594,251,904 31,424,978 29,183,810 0 Reclassification as non-fundamental the fundamental policy prohibiting investment in other investment companies.............................................. 594,057,193 30,542,496 30,261,003 0 Reclassification as non-fundamental the fundamental policy on the purchase or sale of puts, calls, and combinations thereof................................... 593,300,773 30,344,962 31,214,957 0 </Table> - --------------------- * Broker "non-votes" are shares held in street name for which the broker indicates that instructions have not been received from the beneficial owners or other persons entitled to vote and for which the broker does not have discretionary voting authority. 23 TRUSTEES Frank L. Bowman Michael Bozic Kathleen A. Dennis James F. Higgins Dr. Manuel H. Johnson Joseph J. Kearns Michael F. Klein Michael E. Nugent W. Allen Reed Fergus Reid OFFICERS Michael E. Nugent Chairman of the Board Ronald E. Robison President and Principal Executive Officer J. David Germany Vice President Dennis F. Shea Vice President Barry Fink Vice President Amy R. Doberman Vice President Carsten Otto Chief Compliance Officer Stefanie V. Chang Yu Vice President Francis J. Smith Treasurer and Chief Financial Officer Mary E. Mullin Secretary TRANSFER AGENT Morgan Stanley Trust Harborside Financial Center, Plaza Two Jersey City, New Jersey 07311 INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM Deloitte & Touche LLP Two World Financial Center New York, New York 10281 INVESTMENT ADVISER Morgan Stanley Investment Advisors Inc. 1221 Avenue of the Americas New York, New York 10020 The financial statements included herein have been taken from the records of the Fund without examination by the independent auditors and accordingly they do not express an opinion thereon. This report is submitted for the general information of the shareholders of the Fund. For more detailed information about the Fund, its fees and expenses and other pertinent information, please read its Prospectus. The Fund's Statement of Additional Information contains additional information about the Fund, including its trustees. It is available, without charge, by calling (800) 869-NEWS. This report is not authorized for distribution to prospective investors in the Fund unless preceded or accompanied by an effective Prospectus. Read the Prospectus carefully before investing. Morgan Stanley Distributors Inc., member NASD. (c) 2006 Morgan Stanley [MORGAN STANLEY LOGO] MORGAN STANLEY FUNDS Active Assets California Tax-Free Trust Semiannual Report December 31, 2006 [MORGAN STANLEY LOGO] AACSAR-RA07-00166P-Y12/06 Item 2. Code of Ethics. Not applicable for semiannual reports. Item 3. Audit Committee Financial Expert. Not applicable for semiannual reports. Item 4. Principal Accountant Fees and Services Not applicable for semiannual reports. Item 5. Audit Committee of Listed Registrants. Not applicable for semiannual reports. Item 6. Refer to Item 1. Item 7. Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies. Not applicable for semiannual reports. Item 8. Portfolio Managers of Closed-End Management Investment Companies Applicable only to reports filed by closed-end funds. Item 9. Closed-End Fund Repurchases Applicable to reports filed by closed-end funds. Item 10. Submission of Matters to a Vote of Security Holders Not applicable. Item 11. Controls and Procedures (a) The Fund's principal executive officer and principal financial officer have concluded that the Fund's disclosure controls and procedures are sufficient to ensure that information required to be disclosed by the Fund in this Form N-CSR was recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms, based upon such officers' evaluation of these controls and procedures as of a date within 90 days of the filing date of the report. (b) There were no changes in the registrant's internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting. Item 12. Exhibits (a) Code of Ethics - Not applicable for semiannual reports. (b) A separate certification for each principal executive officer and principal financial officer of the registrant are attached hereto as part of EX-99.CERT. 2 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. Active Assets California Tax-Free Trust /s/ Ronald E. Robison - ------------------------------------- Ronald E. Robison Principal Executive Officer February 9, 2007 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed by the following persons on behalf of the registrant and in the capacities and on the dates indicated. /s/ Ronald E. Robison - ------------------------------------- Ronald E. Robison Principal Executive Officer February 9, 2007 /s/ Francis Smith - ------------------------------------- Francis Smith Principal Financial Officer February 9, 2007 3