<html xmlns="http://www.w3.org/1999/xhtml"><head><meta charset="UTF-8" /><title></title><meta name="Generator" content="PowerTools for Open XML" /><style>span { white-space: pre-wrap; } p.sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0 { margin-top: 0; margin-bottom: 0; margin-left: 0; margin-right: 0; text-indent: 0.00in; text-align: justify; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; line-height: 108%; } span.sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0 { background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: normal; margin: 0; padding: 0; } span.sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0-000000 { color: #0000FF; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: bold; margin: 0; padding: 0; } span.sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0-000001 { background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: bold; margin: 0; padding: 0; } span.sca6b160d-0a9b-4758-b0bb-e8f715a450f6000002 { background: white; font-size: 12pt; font-style: normal; font-weight: normal; margin: 0; padding: 0; } span.sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0-000003 { color: #0000FF; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: normal; margin: 0; padding: 0; } p.sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0-000004 { margin-top: 0; margin-bottom: 0; margin-left: 0; margin-right: 0; text-indent: 0.00in; text-align: left; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; line-height: 108%; } </style></head><body><div><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">    </span><a href="https://sdlegislature.gov/Rules?Rule=74:36:01:20"><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0-000000">74:36:01:20</span></a><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0-000001">.  Physical change or change in the method of operation described.</span><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0"> A physical change or change in the method of operation does not include:</span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6000002"> </span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">    (1)  Routine maintenance, repair, and replacement;</span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6000002"> </span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">    (2)  Use of an alternative fuel or raw material because of an order under §§ 2(a) and (b) of the Energy Supply and Environmental Coordination Act of 1974, </span><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">Pub. L. No. 93-319, §§ 2(a) and (b), 88 Stat. 246 (1974), </span><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">as amended and in effect on </span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">(</span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">January 1, 1993</span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">)</span><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">, or because of a natural gas curtailment plan pursuant to the Federal Power Act as in effect on </span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">(</span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">January 1, 1993</span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">)</span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">;</span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6000002"> </span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">    (3)  Use of an alternative fuel because of an order or rule under § 125 of the Clean Air Act;</span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6000002"> </span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">    (4)  Use at a steam generating unit of an alternative fuel that is generated from municipal solid waste;</span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6000002"> </span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">    (5)  An increase in the hours of operation or in the production rate, unless the change is prohibited under a federally enforceable permit condition </span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">that</span><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0"> was established after January 6, 1975, pursuant to 40 C.F.R. § 52.21 (July 1, </span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">2024</span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">), or under regulations approved pursuant to 40 C.F.R. Part 51, Subpart I, or 40 C.F.R. § 51.166 (July 1, 20</span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">24</span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">);</span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6000002"> </span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">    (6)  Any change of ownership at a source;</span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6000002"> </span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">    (7)  The use of an alternative fuel or raw material by a source</span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">,</span><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0"> which the source was capable of accommodating before January 6, 1975, unless the change is prohibited under a federally enforceable permit condition </span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">that</span><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0"> was established after January 6, 1975, pursuant to 40 C.F.R. § 52.21 (July 1, 20</span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">24</span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">), or under regulations approved pursuant to 40 C.F.R. Part 51, Subpart I, or 40 C.F.R. § 51.166 (July 1, 20</span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">24</span><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">); </span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">or</span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6000002"> </span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">    (8)  The use of an alternative fuel or raw material </span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">that</span><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0"> the source is approved to use under a permit issued under 40 C.F.R. § 52.21 (July 1, 20</span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">24</span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">) or under regulations approved pursuant to 40 C.F.R. § 51.165 (July 1, 20</span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">24</span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">).</span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6000002"> </span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">    </span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0-000001">Source:</span><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0"> 25 SDR 123, effective April 4, 1999; 31 SDR 101, effective January 2, 2005; 32 SDR 209, effective June 13, 2006; 36 SDR 207, effective June 28, 2010; 39 SDR 219, effective June 25, 2013; 42 SDR 52, effective October 13, 2015; 44 SDR 43, effective September 13, 2017; 46 SDR 64, effective November 25, 2019</span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">; 52 SDR 27, effective September 17, 2025</span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">.</span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">    </span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0-000001">General Authority:</span><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0"> SDCL </span><a href="https://sdlegislature.gov/Statutes?Statute=34A-1-6"><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0-000003">34A-1-6</span></a><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">.</span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">    </span><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0-000001">Law Implemented:</span><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0"> SDCL </span><a href="https://sdlegislature.gov/Statutes?Statute=34A-1-1"><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0-000003">34A-1-1</span></a><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">, </span><a href="https://sdlegislature.gov/Statutes?Statute=34A-1-6"><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0-000003">34A-1-6</span></a><span class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6C0">.</span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6000002"> </span></p><p dir="ltr" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6P0-000004"><span xml:space="preserve" class="sca6b160d-0a9b-4758-b0bb-e8f715a450f6000002"> </span></p></div></body></html>