<PAGE>
Exhibit (a)(1)(F)
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.
------------------------------------- -------------------------------------
<TABLE>
<CAPTION>
Give the name and
SOCIAL SECURITY
For this type of account: number of--
------------------------------------------------
<S> <C>
1. Individual The individual
2. Two or more individuals The actual owner of
(joint account) the account or, if
combined funds, the
first individual on
the account(1)
3. Custodian account of a The minor(2)
minor (Uniform Gift to
Minors Act)
4.a The usual revocable The grantor-
savings trust trustee(1)
(grantor is also
trustee)
b So-called trust The actual owner(1)
account that is not a
legal or valid trust
under State law
5. Sole proprietorship The owner(3)
6. Sole proprietorship The owner(3)
account
</TABLE>
<TABLE>
<CAPTION>
Give the name and
EMPLOYER
IDENTIFICATION
For this type of account: number of--
-----
<S> <C>
7. A valid trust, estate, The legal entity
or pension trust (Do not furnish the
identifying number
of the personal
representative or
trustee unless the
legal entity itself
is not designated
in the account
title.)(4)
8. Corporate The corporation
9. Association, club, The organization
religious, charitable,
educational, or other
tax-exempt
organization
10. Partnership The partnership
11. A broker or registered The broker or
nominee nominee
12. Account with the The public entity
Department of
Agriculture in the
name of a public
entity (such as a
State or local
government, school
district, or prison)
that receives
agricultural program
payments
</TABLE>
------------------------------------- -------------------------------------
(1) List first and circle the name of the person whose number you furnish. If
only one person on a joint account has a SSN, that person's number must be
furnished.
(2) Circle the minor's name and furnish the minor's social security number.
(3) You must show your individual name, but you may also enter your business
or "doing business as" name. You may use either your social security
number or employment identification number (if you have one).
(4) 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.
<PAGE>
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 Card, or Form SS-
4, Application for Employer Identification Number (for businesses and all
other entities), or Form W-7 for Individual Taxpayer Identification Number
(for alien individuals required to file U.S. tax returns), at an office of the
Social Security Administration or the Internal Revenue Service.
Payees Exempt from Backup Withholding
Payees specifically exempted from backup withholding on all payments include
the following:
. A financial institution.
. An organization exempt from tax under section 501(a), or an individual
retirement plan, or a custodial account under Section 403(b)(7).
. The United States or any agency or instrumentality thereof.
. A State, the District of Columbia, a possession of the United States, or
any political 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.
Payees that may be exempt from backup withholding, including, among others:
. A corporation.
. A registered dealer in securities or commodities registered 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 entity registered at all times during the tax year 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 alien partner.
. Payments of patronage dividends where the amount received is not paid in
money.
. Payments made by certain foreign organizations.
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.
. Payments of tax-exempt interest (including exempt-interest dividends
under section 852).
. Payments described in section 6049(b)(5) to nonresident aliens.
. Payments on tax-free covenant bonds under section 1451.
. Payments made by certain foreign organizations.
. Mortgage interest paid to you.
Exempt payees described above should file a Substitute Form W-9 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 sections 6041, 6041A(a), 6042, 6044, 6045, 6049,
6050A, and 6050N, and their regulations.
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 the IRS. The IRS uses the numbers for
identification purposes and to help verify the accuracy of your 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 correct taxpayer identification number to a payer, you
are subject to a penalty of $50 for each such failure unless your failure 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.
