California Code, Health and Safety Code - HSC § 9069.25

(a) If the owner of an interment right dies without making a valid and enforceable disposition of the interment right by a specific devise in a testamentary device, or by a written designation pursuant to subdivision (c) of Section 9069.20, the interment right shall pass according to the laws of intestate succession as set forth in Sections 6400 to 6413, inclusive, of the Probate Code. In the event that the owner has no heirs at law, the district shall follow the abandonment procedures established under Section 9069.

(b) A surviving spouse, registered domestic partner, child, parent, or heir who has an interment right pursuant to this section may waive that interment right in favor of any other relative of the deceased owner or spouse of a relative of the deceased owner.