EXHIBIT 99.6 GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9 GUIDELINES FOR DETERMINING THE PROPER IDENTIFICATION NUMBER TO GIVE THE PAYER.--Social Security numbers have nine digits separated by two hyphens: i.e., 000-00-0000. Employer identification numbers have nine digits separated by only one hyphen: i.e., 00-0000000. The table below will help determine the number to give the payer. GIVE THE GIVE THE EMPLOYER SOCIAL SECURITY IDENTIFICATION FOR THIS TYPE OF ACCOUNT NUMBER OF-- FOR THIS TYPE OF ACCOUNT NUMBER OF-- - ----------------------------------- ------------------------ ----------------------------------- ------------------------ 1. An individual's account The individual 9. A valid trust, estate, The legal entity (Do not or pension trust furnish the identifying number of the personal representative or trustee unless the legal entity itself is not designated in the account title.)(5) 2. Two or more individuals The actual owner of the 10. Corporate account The corporation (joint account) account or, if combined funds, any one of the individuals(1) 3. Husband and wife (joint The actual owner of the 11. Religious, charitable, The organization account) account or, if joint or educational funds, either person(1) organization account 4. Custodian account of a The minor(2) 12. Partnership account held The partnership minor (Uniform Gift to in the name of the Minors Act) business 5. Adult and minor (joint The adult or, if the 13. Association, club or The organization account) minor is the only other tax-exempt contributor, the organization minor(1) 6. Account in the name of The ward, minor, or 14. A broker or registered The broker or nominee guardian or committee incompetent person(3) nominee for a designated ward, minor, or incompetent person 7. a. The usual revocable The grantor-trustee(1) 15. Account with the The public entity savings trust Department of account (grantor is Agriculture in the name also trustee) of a public entity (such b. So-called trust The actual owner(1) as a State or local account that is not government, school a legal or valid district, or prison) trust under State that receives law agricultural program payments 8. Sole proprietorship The owner(4) account - ------------------------ (1) List first and circle the name of the person whose number you furnish. (2) Circle the minor's name and furnish the minor's social security number. (3) Circle the ward's, minor's or incompetent person's name and furnish such person's social security number. (4) Show the name of the owner. (5) List first and circle the name of the legal trust, estate or pension trust. Note: If no name is circled when there is more than one name, the number will be considered to be that of the first name listed. GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9 PAGE 2 OBTAINING A NUMBER If you don't have a taxpayer identification number or you don't know your number, obtain Form SS-5, Application for A Social Security Number Card, or Form SS-4, Application for Employer Identification Number, at the local office of the Social Security Administration or the Internal Revenue Service and apply for a number. PAYEES EXEMPT FROM BACKUP WITHHOLDING Payees specifically exempted from backup withholding on ALL payments include the following: - A corporation. - A financial institution. - An organization exempt from tax under section 501(a), or an individual retirement plan. - The United States or any agency or instrumentality thereof. - A State, the District of Columbia, a possession of the United States, or any subdivision or instrumentality thereof. - A foreign government, a political subdivision of a foreign government, or any agency or instrumentality thereof. - An international organization or any agency or instrumentality thereof. - A dealer in securities or commodities required to register in the U.S. or a possession of the U.S. - A real estate investment trust. - A common trust fund operated by a bank under section 584(a). - An exempt charitable remainder trust, or a non-exempt trust described in section 4947(a)(1). - An entity registered at all times under the Investment Company Act of 1940. - A foreign central bank of issue. Payments of dividends and patronage dividends not generally subject to backup withholding include the following: - Payments to nonresident aliens subject to withholding under section 1441. - Payments to partnerships not engaged in a trade or business in the U.S. and which have at least one nonresident partner. - Payments of patronage dividends where the amount renewed is not paid in money. - Payments made by certain foreign organizations. - Payments made to a nominee. Payments of interest not generally subject to backup withholding include the following: - Payments of interest on obligations issued by individuals. Note: You may be subject to backup withholding if this interest is $600 or more and is paid in the course of the payer's trade or business and you have not provided your correct taxpayer identification number to the payer. 2 - Payments of tax-exempt interest (including exempt-interest dividends under section 852). - Payments described in section 6049(b)(5) to non-resident aliens. - Payments on tax-free covenant bonds under section 1451. - Payments made by certain foreign organizations. - Payments made to a nominee. Exempt payees described above must still complete the Substitute Form W-9 enclosed herewith to avoid possible erroneous backup withholding. FILE THIS FORM WITH THE PAYER, FURNISH YOUR TAXPAYER IDENTIFICATION NUMBER, WRITE EXEMPT ON THE FACE OF THE FORM, AND RETURN IT TO THE PAYER. IF THE PAYMENTS ARE INTEREST, DIVIDENDS, OR PATRONAGE DIVIDENDS, ALSO SIGN AND DATE THE FORM. Certain payments, other than interest, dividends and patronage dividends, that are not subject to information reporting are also not subject to backup withholding. For details, see the regulations under sections 6041, 6041A(a), 6042, 6044, 6045, 6049, 6050A and 6050N. PRIVACY ACT NOTICE.--Section 6109 requires most recipients of dividend, interest, or other payments to give taxpayer identification numbers to payers who must report the payments to IRS. IRS uses the numbers for identification purposes and to help verify the accuracy of the recipient's tax return. Payers must be given the numbers whether or not recipients are required to file tax returns. Payers must generally withhold 31% of taxable interest, dividend, and certain other payments to a payee who does not furnish a taxpayer identification number to a payer. Certain penalties may also apply. PENALTIES (1) PENALTY FOR FAILURE TO FURNISH TAXPAYER IDENTIFICATION NUMBER.--If you fail to furnish your taxpayer identification number to a payer, you are subject to a penalty of $50 for each such failure which is due to reasonable cause and not to willful neglect. (2) CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING.--If you make a false statement with no reasonable basis which results in no imposition of backup withholding, you are subject to a penalty of $500. (3) CRIMINAL PENALTY FOR FALSIFYING INFORMATION.--Falsifying certifications or affirmations may subject you to criminal penalties including fines and/or imprisonment. FOR ADDITIONAL INFORMATION CONTACT YOUR TAX CONSULTANT OR THE INTERNAL REVENUE SERVICE. 3