Page:United States Statutes at Large Volume 91.djvu/803

 PUBLIC LAW 95-95—AUG. 7, 1977

91 STAT. 769

and any action under section 207(c) shall be required to be effective Ante, p. 755. only for the emission levels which the Administrator determines that such certificate was issued and not for the emission levels required under the applicable standard. "(5) The authorities of section 208(a) shall apply, subject to the 42 USC 7542. conditions of section 208(b), for purposes of this subsection.". (g) Section 202(d) of such Act is amended by striking out "and" 42 USC 7521. at the end of paragraph (1) thereof; by inserting " (other than motorcycles or motorcycle engines)" after "engines" in paragraph (2) thereof; by striking out the period at the end of paragraph (2) and inserting in lieu thereof "; and"; and by adding a new paragraph (3) to read as follows: "(3) in the case of any motorcycle or motorcycle engine, be a period of use the Administrator shall determine.". AIRCRAFT EMISSIONS STANDARDS

SEC. 225. Section 231(c) of the Clean Air Act is amended to read 42 USC 7571. as follows: "(c) Any regulations in effect under this section on date of enact- Notice and ment of the Clean Air Act Amendments of 1977 or proposed or pro- hearing, mulgated thereafter, or amendments thereto, with respect to aircraft shall not apply if disapproved by the President, after notice and opportunity for public hearing, on the basis of a finding by the Secretary of Transportation that any such regulation would create a hazard to aircraft safety. Any such finding shall include a reasonably specific statement of the basis upon which the finding was made.". CARBON MONOXIDE INTRUSION INTO SUSTAINED USE VEHICLES

SEC. 226. (a) The Administrator, in conjunction with the Secretary of Transportation, shall study the problem of carbon monoxide intrusion into the passenger area of sustained-use motor vehicles. Such study shall include an analysis of the sources and levels of carbon monoxide in the passenger area of such vehicles and a determination of the effects of carbon monoxide upon the passengers. The study shall also review available methods of monitoring and testing for the presence of carbon monoxide and shall analyze the cost and effectiveness of alternative methods of monitoring and testing. The study shall analyze the cost and effectiveness of alternative strategies for attaining and maintaining acceptable levels of carbon monoxide in the passenger area of such vehicles. Within one year the Administrator shall report to the Congress respecting the results of such study. (b) For the purpose of this section, the term "sustained-use motor vehicle" means any diesel or gasoline fueled motor vehicle (whether light or heavy duty) which, as determined by the Administrator (in conjunction with the Secretary), is normally used and occupied for a sustained, continuous, or extensive period of time, including buses, taxicabs, and police vehicles.

Study. 42 USC 7521 note.

Report to Congress. "Sustained-use motor vehicle."

TITLE III—AMENDMENTS RELATING PRIMARILY TO TITLE III O F THE CLEAN AIR ACT DEFINITIONS

SEC. 301. (a) Section 302 of the Clean Air Act is amended by 42 USC 7602. adding the following new subsections at the end thereof:

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