Sec. 232. (a) The  Secretary of Transportation, after consulta-
tion  with  the  Administrator, shall  prescribe  regulations  to
insure compliance with all standards prescribed under section 231
by  the  Administrator.  The  regulations  of  the  Secretary  of
Transportation  shall  include provisions  making  such standards
applicable  in the issuance, amendment, modification, suspension,
or  revocation  of  any  certificate authorized  by  the  Federal
Aviation  Act  or  the  Department of  Transportation  Act.  Such
Secretary  shall  insure  that   all  necessary  inspections  are
accomplished, and, may execute any power or duty vested in him by
any other provision  of law  in the execution  of all powers  and
duties vested in him under this section.
  (b)  In any  action  to amend,  modify,  suspend, or  revoke  a
certificate in which violation of an emission standard prescribed
under section 231  or of a regulation prescribed under subsection
(a)  is  at issue,  the certificate  holder  shall have  the same
notice  and appeal rights as  are prescribed for  such holders in
the  Federal  Aviation   Act  of  1958   or  the  Department   of
Transportation  Act, except  that in  any appeal to  the National
Transportation  Safety Board,  the  Board may  amend, modify,  or
revoke  the order of the  Secretary of Transportation  only if it
finds no violation of  such standard or regulation and  that such
amendment, modification,
or revocation is consistent with safety in air transportation.
[42 U.S.C. 7572]