The authority to initiate, conduct, and complete any proceeding pursuant to subdivision (a) of Section 56375.3 does not apply to any territory that, after January 1, 2014, became surrounded or substantially surrounded by the city to which annexation is proposed, except for islands that were created after January 1, 2014, as a result of boundary adjustments between two counties.
Source:
Section 56375.4, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=GOV§ionNum=56375.4..