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.