Wyo. Stat. » Wyo. Stat. / Title 08 - General Provisions / Chapter 1 - COMMON LAW, STATUTES AND RULES OF CONSTRUCTION / Article
Wyoming Statutes

Wyo. Stat. § 8-1-107 (2026)

Effect of amendment or repeal on pending actions.

✓ current as of May 2026
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If a statute is repealed or amended, the repeal or amendment
does not affect pending actions, prosecutions or proceedings,
civil or criminal. If the repeal or amendment relates to the
remedy, it does not affect pending actions, prosecutions or
proceedings, unless so expressed, nor shall any repeal or
amendment affect causes of action, prosecutions or proceedings
existing at the time of the amendment or repeal, unless
otherwise expressly provided in the amending or repealing act.
Notes of Decisions
Cited in 33 cases, 1980–2019 · leading case: BP Am. Prod. Co. v. Dep't of Revenue, 2006 WY 27 (Wyo. 2006).
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BP Am. Prod. Co. v. Dep't of Revenue, 2006 WY 27 (Wyo. 2006). · cites it 8× “Does W.S. § 8-1-107 apply to limit W.S. § 39-2-201© to prospective application when, at the time of the enactment of W.”
U S West Commc'ns, Inc. v. Wyoming Pub. Serv. Comm'n, 958 P.2d 376 (Wyo. 1998). · cites it 34× “Relying on Wyo. Stat. § 8-1-107 (1997), Silver Star argues that the PSC's authority must be determined under the Public Utilities Act, Wyo.”
Mantle v. N. Star Energy & Constr. LLC, 437 P.3d 758 (Wyo. 2019). · cites it 2× “Wyo. Stat. Ann. § 8-1-107 ("If a statute is repealed or amended, the repeal or amendment does not affect pending actions, prosecutions or proceedings, civil or criminal.”
Tamra Acorn, Rebecca Shwen, & Federer Holding Co., LLC, a Wyoming close Ltd. Liab. Co. v. Lori Moncecchi & Dino Moncecchi, 2016 WY 124 (Wyo. 2016). · cites it 2× “Wyo. Stat. Ann. § 8-1-107 (LexisNexis 2015) provides: If a statute is repealed or amended, the repeal or amendment does not affect pending actions, prosecutions or proceedings, civil or criminal.”
Mary Lankford, in her Off. capacity as Sublette Cnty. Clerk v. Paul Rock, Dari Quirk, & Ernest Kawa, 2013 WY 61 (Wyo. 2013). · cites it 3× “Wyo. Stat. Ann. § 8-1-107 (LexisNexis 2011).”
Pagel v. Franscell, 2002 WY 169 (Wyo. 2002). · cites it 4× “After a case between two parties has been decided, can the Legislature alter the decision in that case by changing the law "retroactively," consistent with the "separation of powers" doctrine and W.S. § 8-1-107, when the words of the statutory amendment itself require a…”
Matthew Scott Worley v. State, 2017 WY 3 (Wyo. 2017). · cites it 2× “Wyo. Stat. Ann. § 8-1-107 (Lexis Nexis 2015).”
Greene v. State, 2009 WY 99 (Wyo. 2009). · cites it 8× “Wyo. Stat. Ann. § 8-1-107 (LexisNexis 2007).”
State v. Mares, 335 P.3d 487 (Wyo. 2014). · cites it 2× “2009) (citing Wyo. Stat. Ann. § 8-1-107 ). The amended parole and life imprisonment statutes do not expressly provide that they are to apply retroactively, and we therefore assume a prospective application only.”
Engberg v. Meyer, 820 P.2d 70 (Wyo. 1991). · cites it 2× “For the purposes of W.S. 8-1-107, amendments to W.S. 6-2-102 for retrial do not affect a pending prosecution following prior reversal of conviction.”
Lewis Alan Dugan v. The State of Wyoming, 2019 WY 112 (Wyo. 2019). · cites it 2× “Dugan’s constitutional claim involves a question of law which we review de novo.”
Caton v. State, 709 P.2d 1260 (Wyo. 1985). · cites it 2× “Section 8-1-107, W.S. 1977, answers that contention.”
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