40 C.F.R. § 202.11 Effective date.
Title 40 - Protection of Environment
The provisions of Subpart B shall become effective October 15, 1975, except that the provisions of §202.20(b) and §202.21(b) of Subpart B shall apply to motor vehicles manufactured during or after the 1986 model year. [51 FR 852, Jan. 8, 1986]
Title 40: Protection of Environment
PART 202—MOTOR CARRIERS ENGAGED IN INTERSTATE COMMERCE
Subpart A—General Provisions
§ 202.11 Effective date.