part_subject: "NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS"
subpart_code: "A"
subpart_subject: "General Provisions"
section_number: "61.17"
section_subject: "State authority."
cfr_reference: "40 CFR 61.17"
title_name: "Title 40"
title_subject: "Protection of Environment"
parts_covered: "Parts 61 to 62"
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"
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(a)This part shall not be construed to preclude any State or political subdivision thereof from—
(1)Adopting and enforcing any emission limiting regulation applicable to a stationary source, provided that such emission limiting regulation is not less stringent than the standards prescribed under this part; or
(2)Requiring the owner or operator of a stationary source to obtain permits, licenses, or approvals prior to initiating construction, modification, or operation of the source.