Section 10-2-429 - Automatic annexations in county of the first class(1) As used in this section: (a) "Most populous bordering municipality" means the municipality with the highest population of any municipality that shares a common border with an unincorporated island.(b) "Unincorporated island" means an area that is:(i) within a county of the first class;(ii) not within a municipality; and(iii) completely surrounded by land that is within one or more municipalities within the county of the first class.(2)(a) Notwithstanding any other provision of this part, on July 1, 2027 an unincorporated island is automatically annexed to: (i) the most populous bordering municipality, except as provided in Subsection (2)(a)(ii); or(ii) a municipality other than the most populous bordering municipality if:(A) the other municipality shares a common border with the unincorporated island; and(B) the other municipality and the most populous bordering municipality each adopt a resolution agreeing that the unincorporated island should be annexed to the other municipality.(b) The effective date of an annexation under Subsection (2)(a) is governed by Section 10-2-425.Added by Chapter 342, 2024 General Session ,§ 4, eff. 5/1/2024.