Section 23258.

Cal. Government Code - GOV § 23258.
in effect
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Boundary lines between counties may not be changed if as a result of such change: (a) a strip of untransferred territory less than 200 feet wide and more than 300 feet long is created; (b) a strip of untransferred territory consisting solely of a highway or portion thereof is created; or (c) the territory of any incorporated city is divided.
Source: CA Legislative Counsel Bulk DataURL: https://downloads.leginfo.legislature.ca.gov/pubinfo_2025.zipFetched: 6/27/2026

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