SEC. 613. FEDERAL PROCUREMENT.
 Not later  than 18 months  after the enactment of  the Clean Air
Act Amendments  of 1990, the Administrator,  in consultation with
the Administrator of the  General Services Administration and the
Secretary of Defense, shall promulgate regulations requiring each
department, agency,  and instrumentality of the  United States to
conform its procurement regulations  to the policies and require-
ments  of this  title and  to maximize  the substitution  of safe
alternatives identified under section  612 for class I and  class
II  substances. Not later than  30 months after  the enactment of
the Clean Air  Act Amendments of  1990, each department,  agency,
and instrumentality  of the United  States shall  so conform  its
procurement  regulations and  certify to  the President  that its
regulations have been modified in accordance with this section.
[42 U.S.C. 7671l]