§52.1370. Identification of plan.
40 C.F.R. § 52.1370
Purpose and scope. This section sets forth the applicable State Implementation Plan for Montana under section 110 of the Clean Air Act, 42 U.S.C. 7410 and 40 CFR part 51 to meet national ambient air quality standards or other requirements under the Clean Air Act.
Incorporation by reference.
Material listed in paragraphs (c), (d), and (e) of this section with an EPA approval date prior to March 1, 2015, was approved for incorporation by reference by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Material is incorporated as submitted by the state to EPA, and notice of any change in the material will be published in the Federal Register. Entries for paragraphs (c), (d), and (e) of this section with EPA approval dates after March 1, 2015, will be incorporated by reference in the next update to the SIP compilation.
EPA Region 8 certifies that the rules/regulations provided by EPA in the SIP compilation at the addresses in paragraph (b)(3) of this section are an exact duplicate of the officially promulgated state rules/regulations which have been approved as part of the State Implementation Plan as of March 1, 2015.
Copies of the materials incorporated by reference may be inspected at the Environmental Protection Agency, Region 8, 1595 Wynkoop Street, Denver, Colorado 80202-1129; Air and Radiation Docket and Information Center, U.S. Environmental Protection Agency, West Building, 1301 Constitution Ave. NW., Washington, DC 20460; and, the National Archives and Records Administration (NARA). For information on the availability of materials from the docket in the EPA Headquarters Library, please call the Office of Air and Radiation (OAR) at (202) 566-1742. For information on the availability of this material at NARA, call (202) 741-6030, or go to http://www.archives.gov/federal-register/cfr/ibr-locations.html. Copies of the Montana regulations we have approved are also available at http://www.epa.gov/region8/air/sip.html.
EPA-approved regulations.
EPA-approved source-specific requirements.
EPA-approved nonregulatory provisions— .
Notes, amendments, and revision history
Amendments
[80 FR 22911, Apr. 24, 2015, as amended at 80 FR 50584, Aug. 20, 2015; 81 FR 23186, Apr. 20, 2016; 81 FR 28719, May 10, 2016; 82 FR 24855, May 31, 2017; 83 FR 13198, Mar. 28, 2018; 83 FR 29695, June 26, 2018; 84 FR 24038, May 24, 2019; 84 FR 37777, Aug. 2, 2019; 84 FR 47887, 47896, 47899, Sept. 11, 2019; 84 FR 53061, Oct. 4, 2019; 85 FR 5330, Jan. 30, 2020; 85 FR 38329, June 26, 2020; 86 FR 33548, June 25, 2021; 87 FR 7728, Feb. 10, 2022; 87 FR 21579, Apr. 12, 2022; 87 FR 34796, 34798, June 8, 2022; 88 FR 41323, June 26, 2023; 88 FR 47383, July 24, 2023; 90 FR 4657, Jan. 16, 2025; 90 FR 51514, Nov. 18, 2025; 90 FR 54588, Nov. 28, 2025; 91 FR 27210, May 14, 2026]
Authority
Authority: 42 U.S.C. 7401 et seq.
Amendments
[40 FR 5521, Feb. 6, 1975]
Amendments
[80 FR 22911, Apr. 24, 2015, as amended at 80 FR 50584, Aug. 20, 2015; 81 FR 23186, Apr. 20, 2016; 81 FR 28719, May 10, 2016; 82 FR 24855, May 31, 2017; 83 FR 13198, Mar. 28, 2018; 83 FR 29695, June 26, 2018; 84 FR 24038, May 24, 2019; 84 FR 37777, Aug. 2, 2019; 84 FR 47887, 47896, 47899, Sept. 11, 2019; 84 FR 53061, Oct. 4, 2019; 85 FR 5330, Jan. 30, 2020; 85 FR 38329, June 26, 2020; 86 FR 33548, June 25, 2021; 87 FR 7728, Feb. 10, 2022; 87 FR 21579, Apr. 12, 2022; 87 FR 34796, 34798, June 8, 2022; 88 FR 41323, June 26, 2023; 88 FR 47383, July 24, 2023; 90 FR 4657, Jan. 16, 2025; 90 FR 51514, Nov. 18, 2025; 90 FR 54588, Nov. 28, 2025; 91 FR 27210, May 14, 2026]