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      standards established under this section,  

         "(B) alerting the vehicle's owner or operator  to the likely

      need for emission-related components or  systems maintenance or


         "(C)  storing and  retrieving fault  codes specified  by the

      Administrator, and  

         "(D)  providing access  to  stored information  in  a manner

      specified by the Administrator.  

   The  Administrator   may,  in   the  Administrator's   discretion,

   promulgate  regulations requiring  manufacturers  to  install such

   onboard diagnostic systems on heavy-duty vehicles and engines.

      "(2)  Effective date.-The regulations  required under paragraph

   (1)  of this  subsection  shall take  effect  in model  year 1994,

   except that  the Administrator may  waive the application of  such

   regulations for  model year 1994 or 1995 (or both) with respect to

   any  class or  category  of  motor vehicles  if  the Administrator

   determines that it would be infeasible to apply the regu-

   lations  to that class  or category  in such model  year or years,

   consistent with corresponding  regulations or policies adopted  by

   the California Air Resources Board for such systems.

      "(3)  State inspection.-The  Administrator shall  by regulation

   require  States that  have implementation  plans  containing motor

   vehicle inspection and  maintenance programs to amend  their plans

   within 2 years  after promulgation of such  regulations to provide

   for inspection  of onboard diagnostics  systems (as prescribed  by

   regulations under  paragraph (1) of  this subsection) and for  the

   maintenance  or repair  of  malfunctions  or system  deterioration

   identified   by  or  affecting   such  diagnostics  systems.  Such

   regulations  shall not  be inconsistent  with  the provisions  for

   warranties promulgated under section 207(a) and (b).  

      "(4) Specific requirements.-In  promulgating regulations  under

   this subsection, the Administrator shall require-

         "(A) that any  connectors through which the emission control

      diagnostics  system  is  accessed  for  inspection,  diagnosis,

      service, or repair shall  be standard and uniform on  all motor

      vehicles and motor vehicle engines;

         "(B) that access  to the emission control diagnostics system

      through  such connectors  shall be  unrestricted and  shall not

      require any access code  or any device which is  only available

      from a vehicle manufacturer; and

         "(C) that the  output of the data from the  emission control

      diagnostics  system  through such  connectors  shall  be usable

      without the need for any unique decoding information or device.

      "(5)    Information    availability.-The   Administrator,    by

   regulation, shall  require (subject to  the provisions of  section

   208(c) regarding the  protection of methods or  processes entitled

   to protection as trade secrets) manufacturers  to provide promptly

   to  any person  engaged  in the  repairing  or servicing  of motor

   vehicles  or motor vehicle engines,  and the Administrator for use

   by any such  persons, with any and all  information needed to make

   use of  the emission control  diagnostics system prescribed  under

   this  subsection and such other information including instructions

   for  making  emission  related  diagnosis  and  repairs.  No  such

   information  may  be   withheld  under  section  208(c)   if  that

   information   is   provided  (directly   or  indirectly)   by  the

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