part_subject: "REQUIREMENTS FOR PREPARATION, ADOPTION, AND SUBMITTAL OF IMPLEMENTATION PLANS"
subpart_code: "N"
subpart_subject: "Compliance Schedules"
section_number: "51.261"
section_subject: "Final compliance schedules."
cfr_reference: "40 CFR 51.261"
title_name: "Title 40"
title_subject: "Protection of Environment"
parts_covered: "Parts 50 to 51"
revised_date: "Revised as of July 1, 2019"
publication_date: "As of July 1, 2019"
contains_description: "Containing a codification of documents of general applicability and future effect"
publication_info: "Published by the Office of the Federal Register National Archives and Records Administration as a Special Edition of the Federal Register"
---
(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).