Section 23258 Of Article 4.5. Alteration Of Boundaries From California Government Code >> Division 1. >> Title 3. >> Chapter 2. >> Article 4.5.

. 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.