Cal. Education Code § 56041

Except for those pupils meeting residency requirements for school attendance specified in subdivision (a) of Section 48204, and notwithstanding any other provision of law, if it is determined by the individualized education program team that special education services are required beyond the pupil’s 18th birthday, the district of residence responsible for providing special education and related services to pupils between the ages of 18 to 22 years, inclusive, shall be assigned, as follows: (a) For nonconserved pupils, the last district of residence in effect prior to the pupil’s attaining the age of majority shall become and remain as the responsible local educational agency, as long as and until the parent or parents relocate to a new district of residence. At that time, the new district of residence shall become the responsible local educational agency. (b) For conserved pupils, the district of residence of the conservator shall attach and remain the responsible local educational agency, as long as and until the conservator relocates or a new one is appointed. At that time, the new district of residence shall attach and become the responsible local educational agency.