================================================================================ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 40-F/A AMENDMENT NO. 1 [_] Registration Statement pursuant to section 12 of the Securities Exchange Act of 1934 [X] Annual report pursuant to section 13(a) or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2006 Commission File Number:333-90736 WESTERN OIL SANDS INC. (Exact name of Registrant as specified in its charter) ALBERTA (Province or other jurisdiction of incorporation or organization) 1311 (Primary Standard Industrial Classification Code Number (if applicable)) NOT APPLICABLE (I.R.S. Employer Identification Number (if applicable)) 2400 ERNST & YOUNG TOWER, 440-2ND AVENUE S.W., CALGARY, ALBERTA, CANADA, T2P 5E9 TELEPHONE: (403) 233-1700 (Address and telephone number of Registrant's principal executive offices) CT CORPORATION SYSTEM, 111-8TH AVENUE, NEW YORK, NEW YORK 10011 (212) 894-8940 (Name, address (including zip code) and telephone number (including area code) of agent for service in the United States) SECURITIES REGISTERED OR TO BE REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT: None SECURITIES REGISTERED OR TO BE REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT: None SECURITIES FOR WHICH THERE IS A REPORTING OBLIGATION PURSUANT TO SECTION 15(d) OF THE ACT: The Registrant is a "voluntary filer" and files annual reports on Form 40-F and amendments to such reports, and furnishes information on Form 6-K to the Securities and Exchange Commission, pursuant to its obligations under its indenture dated April 23, 2002 relating to its 8 3/8% Senior Secured Notes due May 1, 2012 FOR ANNUAL REPORTS, INDICATE BY CHECK MARK THE INFORMATION FILED WITH THIS FORM: [_] Annual information form [_] Audited annual financial statements INDICATE THE NUMBER OF OUTSTANDING SHARES OF EACH OF THE ISSUER'S CLASSES OF CAPITAL OR COMMON STOCK AS OF THE CLOSE OF THE PERIOD COVERED BY THE ANNUAL REPORT. 161,378,399 Common Shares outstanding as of December 31, 2006 Indicate by check mark whether the Registrant by filing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934 (the "Exchange Act"). If "Yes" is marked, indicate the file number assigned to the Registrant in connection with such Rule. Yes [_] No [X] Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Exchange Act during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days. Yes [X] No [_] ================================================================================ EXPLANATORY NOTE The Registrant is filing this Amendment No. 1 (this "Amendment") to the Annual Report on Form 40-F for the year ended December 31, 2006 to correct a typographical error in the date of the fiscal year referenced in the certification signed by the Registrant's Senior Vice President, Finance and Chief Financial Officer (Principal Financial Officer) required by Rule 13a-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code. Other than as expressly set forth above, this Amendment does not, and does not purport to, update or restate the information in any Item of the Form 40-F or reflect any events that have occurred after the Form 40-F was filed. UNDERTAKING AND CONSENT TO SERVICE OF PROCESS UNDERTAKING The Registrant undertakes to make available, in person or by telephone, representatives to respond to inquiries made by the Commission staff, and to furnish promptly, when requested to do so by the Commission staff, information relating to: securities registered pursuant to Form 40-F; the securities in relation to which the obligation to file an annual report on Form 40-F arises; or transactions in said securities. CONSENT TO SERVICE OF PROCESS A Form F-X signed by the Registrant and its agent for service of process has been filed with the Commission in connection with its 8 3/8% Senior Secured Notes due May 1, 2012. Any change to the name or address of the agent for service of process of the Registrant shall be communicated promptly to the Commission by an amendment to the Form F-X referencing the file number of the Registrant. 3 SIGNATURE Pursuant to the requirements of the Exchange Act, the Registrant certifies that it meets all of the requirements for filing on Form 40-F and has duly caused this Amendment No. 1 to the Annual Report on Form 40-F to be signed on its behalf by the undersigned, thereto duly authorized. Dated this 19th day of July, 2007 WESTERN OIL SANDS INC. By: /s/ David A. Dyck --------------------------- Name: David A. Dyck Title: Senior Vice President, Finance and Chief Financial Officer 4 Documents filed as part of this report: EXHIBIT INDEX EXHIBIT NO. DESCRIPTION - ----------- ----------- 1* Annual Information Form for the fiscal year ended December 31, 2006. 2* Consolidated Financial Statements for the fiscal years ended December 31, 2006 and 2005 including U.S. GAAP reconciliation note, together with the auditors' report thereon. 3* Management's Discussion and Analysis for the fiscal year ended December 31, 2006. 4* Certification of Chief Executive Officer pursuant to Rule 13a-14(a) or 15d-14 of the Securities Exchange Act of 1934. 5* Certification of Chief Financial Officer pursuant to Rule 13a-14(a) or 15d-14 of the Securities Exchange Act of 1934. 6* Certification of Chief Executive Officer pursuant to Rule 13a-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. 1350). 7 Certification of Chief Financial Officer pursuant to Rule 13a-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. 1350). 8* Consent of PricewaterhouseCoopers LLP, independent chartered accountants. 9* Consent of GLJ Petroleum Consultants Ltd., independent petroleum engineering consultants. 10* Consent of Norwest Corporation, independent mining engineering consultants. - ----------------- * previously filed