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TITLE 40 - PROTECTION OF ENVIRONMENT
CHAPTER I - ENVIRONMENTAL PROTECTION AGENCY
PART 86 - CONTROL OF EMISSIONS FROM NEW AND IN - USE HIGHWAY VEHICLES AND ENGINES
subpart a - GENERAL PROVISIONS FOR EMISSION REGULATIONS FOR 1977 AND LATER MODEL YEAR NEW LIGHT - DUTY VEHICLES, LIGHT - DUTY TRUCKS AND HEAVY - DUTY ENGINES, AND FOR 1985 AND LATER MODEL YEAR NEW GASOLINE FUELED, NATURAL GAS - FUELED, LIQUEFIED PETROLEUM GAS - FUELED AND METHANOL - FUELED HEAVY - DUTY VEHICLES
86.084 - 4 - Section numbering; construction.
(a) Section numbering. (1) The model year of initial applicability is indicated by the last two digits of the 5-digit group. A section remains in effect for subsequent model years until it is superseded. The number following the hyphen designates what previous section is replaced by a future regulation.
Examples: Section 86.0776 applies to the 1977 and subsequent model years until superseded. If a 86.0806 is promulgated it would take effect with the 1980 model year; 86.0776 would not apply after the 1979 model year.
Section 86.07710 would be replaced by 86.07810 beginning with the 1978 model year.
(2) Where a section still in effect references a section that has been superseded, the reference shall be interpreted to mean the superseding section.
(b) A section reference without a model year suffix refers to the section applicable for the appropriate model year.
(c) Construction. Except where indicated, the language in this subpart applies to both vehicles and engines. In many instances, language referring to engines is enclosed in parentheses and immediately follows the language discussing vehicles.
[45 FR 63747, Sept. 25, 1980, as amended at 59 FR 48492, Sept. 21, 1994]
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