SEC. 248. FEDERAL AGENCY FLEETS.
  (a) Additional  Provisions Applicable.- The  provisions of this
section  shall apply, in addition to the other provisions of this
part, in the case of covered fleet  vehicles owned or operated by
an agency,  department, or instrumentality of  the United States,
except as otherwise provided in subsection (e).
Sec. 248
  (b) Cost  of Vehicles  to Federal Agency.-  Notwithstanding the
provisions of section 211 of the Federal Property and Administra-
tive Services  Act of 1949, the Administrator of General Services
shall not include the incremental costs of clean-fuel vehicles in
the  amount  to  be   reimbursed  by  Federal  agencies   if  the
Administrator of General  Services determines that appropriations
provided pursuant to this paragraph are sufficient to provide for
the incremental cost of such vehicles over the cost of comparable
conventional vehicles.
  (c) Limitations on Appropriations.- Funds appropriated pursuant
to  the authorization  under this  paragraph shall  be applicable
only- 
       (1) to the portion of the cost of acquisition, maintenance
     and  operation of vehicles  acquired under this subparagraph
     which  exceeds  the  cost of  acquisition,  maintenance  and
     operation of comparable conventional vehicles;
       (2)  to the  portion  of the  costs  of fuel  storage  and
     dispensing  equipment attributable  to  such vehicles  which
     exceeds   the   costs  for   such   purposes   required  for
     conventional vehicles; and
       (3) to the portion  of the costs of acquisition  of clean-
     fuel vehicles  which represents a reduction  in revenue from
     the disposal of such vehicles as compared to revenue result-
     ing from the disposal of comparable conventional vehicles.
  (d) Vehicle  Costs.- The incremental cost  of vehicles acquired
under this part over the cost of comparable conventional vehicles
shall  not  be  applied to  any  calculation  with  respect to  a
limitation under law  on the maximum cost  of individual vehicles
which may be required by the United States.
  (e) Exemptions.- The requirements of this part shall not  apply
to  vehicles with respect to  which the Secretary  of Defense has
certified to the Administrator that  an exemption is needed based
on national security consideration.
  (f)  Acquisition Requirement.- Federal  agencies, to the extent
practicable,  shall  obtain  clean-fuel  vehicles  from  original
equipment manufacturers.
  (g) Authorization  of Appropriations.- There are  authorized to
be appropriated  such sums as  may be required  to carry out  the
provisions  of  this section:  Provided,  That such  sums  as are
appropriated for the Administrator  of General Services  pursuant
to the authorization  under this  section shall be  added to  the
General Supply Fund  established in  section 109  of the  Federal
Property and Administrative Services Act of 1949.
[42 U.S.C. 7588]