<PAGE>
EXHIBIT (a)(4)
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.
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<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, any
one of the
individuals(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)
</TABLE>
<TABLE>
<CAPTION>
Give the Name and
EMPLOYER
IDENTIFICATION
For This Type of Account: Number of
---
<S> <C>
6. Sole proprietorship The owner(3)
7. A valid trust, estate, Legal entity(1)
or pension trust
8. Corporate The corporation
9. Association, club, The organization
religious, charitable,
or 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>
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(1) List first and circle the name of the person whose number you furnish. If
only one person on a joint account has a social security number, 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 employer identification number (if you have one).
(4) List first and circle the name of the legal trust, estate, 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.
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 Internal Revenue Service Form SS-5, Application for a Social
Security Number Card, or Form SS-4, Application for Employer Identification
Number, at your 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.
. 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 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 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.
. A middleman known in the investment community as a nominee or who is
listed in the most recent publication of the American Society of Corporate
Secretaries, Inc., Nominee List.
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 received 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.
. 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.
. Payments made to a nominee.
Exempt payees described above should file 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. IF YOU ARE A NONRESIDENT ALIEN OR A FOREIGN
ENTITY NOT SUBJECT TO BACKUP WITHHOLDING, FILE WITH PAYER A COMPLETED INTERNAL
REVENUE SERVICE FORM W-8 BEN or other FORM W-8.
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),
6045, and 6050A.
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. Payers must be given the numbers whether or not recipients are
required to file tax returns. Beginning January 1, 1984, 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 unless your failure is due
to reasonable cause and not to willful neglect.
(2) Failure to Report Certain Dividend and Interest Payments.--If you fail to
include any portion of an includible payment for interest, dividends, or
patronage dividends in gross income, such failure will be treated as being due
to negligence and will be subject to a penalty of 5% on any portion of an
under-payment attributable to that failure unless there is clear and
convincing evidence to the contrary.
(3) 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.
(4) 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.
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