1
 
            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
 
GUIDELINES FOR DETERMINING THE PROPER IDENTIFICATION NUMBER FOR THE PAYEE (YOU)
TO GIVE THE PAYER. -- Social security numbers have nine digits separated by two
hyphens: i.e., 000-00-0000. Employee 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. All "Section" references are to the
Internal Revenue Code of 1986, as amended. "IRS" is the Internal Revenue
Service.
 
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                                         GIVE THE SOCIAL SECURITY
FOR THIS TYPE OF ACCOUNT:                NUMBER OF --
- - ---------------------------------------------------------------------
 1.  Individual                          The individual
 2.  Two or more individuals (joint      The actual owner of the ac-
     account)                            count or, if combined funds,
                                         the first individual on the
                                         account(1)
 3.  Custodian account of a minor        The minor(2)
     (Uniform Gift to Minors Act)
 4.  a. The usual revocable savings      The grantor-trustee(1)
     trust account (grantor is also
        trustee)                         The actual owner(1)
     b. So-called trust account that
     is not a legal or valid trust
        under state law
 5.  Sole proprietorship                 The owner(3)
- - ---------------------------------------------------------------------
                                         GIVE THE EMPLOYER IDEN-
  FOR THIS TYPE OF ACCOUNT:              TIFICATION NUMBER OF --
- - ---------------------------------------------------------------------
 6.  Sole proprietorship                 The owner(3)
 7.  A valid trust, estate, or           The legal entity(4)
     pension trust
 8.  Corporate                           The corporation
 9.  Association, club, religious,       The organization
     charitable, educational, or
     other tax-exempt organization
     account
10.  Partnership                         The partnership
11.  A broker or registered nominee      The broker or nominee
12.  Account with the Department of      The public entity
     Agriculture in the name of a
     public entity (such as a state
     or local government, school
     district, or prison) that
     receives agricultural program
     payments

 
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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
   your 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 taxpayer identification 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.
 
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, at the local
Social Administration office, or Form SS-4, Application for Employer
Identification Number, by calling 1 (800) TAX-FORM, and apply for a number.
 
PAYEES EXEMPT FROM BACKUP WITHHOLDING
 
Payees specifically exempted from withholding include:
 
- - - An organization exempt from tax under Section 501(a), an individual retirement
  account (IRA), or a custodial account under Section 403(b)(7), if the account
  satisfies the requirements of Section 401(f)(2).
- - - The United States or a state thereof, the District of Columbia, a possession
  of the United States, or a political subdivision or wholly-owned agency or
  instrumentality of any one or more of the foregoing.
- - - An international organization or any agency or instrumentality thereof.
- - - A foreign government and any political subdivision, agency or instrumentality
  thereof.
 
Payees that may be exempt from backup withholding include:
- - - A corporation.
- - - A financial institution.
- - - A dealer in securities or commodities required to register in the United
  States, the District of Columbia, or a possession of the United States.
- - - 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 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.
- - - A futures commission merchant registered with the Commodity Futures Trading
  Commission.
- - - A foreign central bank of issue.
 
    Payments of dividends and patronage dividends generally exempt from backup
withholding include:
- - - Payments to nonresident aliens subject to withholding under Section 1441.
- - - Payments to partnerships not engaged in a trade or business in the United
  States and that have at least one nonresident alien partner.
- - - Payments of patronage dividends not paid in money.
- - - Payments made by certain foreign organizations.
- - - Section 404(k) payments made by an ESOP.
 
    Payments of interest generally exempt from backup withholding include:
- - - Payments of interest on obligations issued by individuals. Note: You may be
  subject to backup withholding if this interest is $600 or more 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.
 
  Certain payments, other than payments of interest, dividends, and patronage
dividends, that are exempt from information reporting are also exempt from
backup withholding. For details, see the regulations under sections 6041, 6041A,
6042, 6044, 6045, 6049, 6050A and 6050N.
 
  Exempt payees described above must file Form W-9 or a substitute Form W-9 to
avoid possible erroneous backup withholding. FILE THIS FORM WITH THE PAYER,
FURNISH YOUR TAXPAYER IDENTIFICATION NUMBER, WRITE "EXEMPT" IN PART II OF THE
FORM, AND RETURN IT TO THE PAYER. IF THE PAYMENTS ARE OF INTEREST, DIVIDENDS, OR
PATRONAGE DIVIDENDS, ALSO SIGN AND DATE THE FORM.
 
PRIVACY ACT NOTICE. -- Section 6109 requires you to provide your correct
taxpayer identification number to payers, who must report the payments to the
IRS. The IRS uses the number for identification purposes and may also provide
this information to various government agencies for tax enforcement or
litigation purposes. 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 payer. Certain penalties may also apply.
 
PENALTIES
 
(1) 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) CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING. -- If you
make a false statement with no reasonable basis that results in no backup
withholding, you are subject to a $500 penalty.
 
(3) CRIMINAL PENALTY FOR FALSIFYING INFORMATION. -- Willfully 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.