CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER C—AIR PROGRAMS (Parts 50–99) > PART 51—REQUIREMENTS FOR PREPARATION, ADOPTION, AND SUBMITTAL OF IMPLEMENTATION PLANS > SUBPART N—Compliance Schedules (§51.260 to §51.262) > 51.261—Final compliance schedules.

51.261—Final compliance schedules.

(a) Unless EPA grants an extension under subpart R, compliance schedules designed to provide for attainment of a primary standard must—
(1) Provide for compliance with the applicable plan requirements as soon as practicable; or
(2) Provide for compliance no later than the date specified for attainment of the primary standard under;
(b) Unless EPA grants an extension under subpart R, compliance schedules designed to provide for attainment of a secondary standard must—
(1) Provide for compliance with the applicable plan requirements in a reasonable time; or
(2) Provide for compliance no later than the date specified for the attainment of the secondary standard under § 51.110(c).