Cal. Health & Safety Code § 7954

The cemetery authority shall prepare a complete map or plat describing and showing the location and subdivision into plots of the cemetery lands where remains are reinterred, or a plan of any mausoleum or columbarium in which such remains are interred; and there shall be attached to each plan a description of the name, where known, of each person whose remains are reinterred, and the plot in the cemetery, or the niche or compartment in the mausoleum or columbarium where such remains are reinterred.