Cal. Public Resources Code - PRC § 49050. Section 49050.
The boundaries of any district may be altered, and outlying districts or territory, whether incorporated or unincorporated, and whether contiguous or noncontiguous, may be annexed pursuant to the Cortese-Knox-Hertzberg Local Government Reorganization Act of 2000 (Division 3 (commencing with Section 56000) of Title 5 of the Government Code). However, no parcel of noncontiguous territory that contains less than 10 privately owned acres may be annexed to any district.