Cal. HSC § 9050

(a) A district may acquire, construct, improve, maintain, or repair a columbarium for the placement of cremated remains. (b) A district shall comply with the Mausoleum and Columbarium Law, Part 5 (commencing with Section 9501). (c) A district that sells interment rights in a columbarium shall require a deposit to be made in the endowment care fund pursuant to Section 9065.