Cal. Health & Saf. Code § 7701
The governing body of such city or city and county may in any ordinance ordering or directing the disinterment and removal of such remains prescribe reasonable rules and regulations governing the manner of making disinterments and removals and providing for reinterment in cemeteries outside the city or city and county limits.
The ordinance shall prescribe a reasonable time of not less than two years in which the removal of remains may be made by the cemetery authority, or by the owners or holders of interment spaces, or by the relatives or friends of those whose remains are interred in the cemetery, and may also provide that if the remains are not removed within the period fixed, the city or city and county will itself proceed to remove the remains and reinter them in another cemetery or cemeteries outside the city or city and county limits.
Ca. Health and Saf. Code § 7701