California Code
ARTICLE 2 - Structural and Material Requirements of Community Mausoleums and Columbariums
Section 9636.

9636. All marble floors shall be constructed on a bed of mortar or mastic placed on the floor subslab, with an approved additive to retard efflorescence.

(Amended by Stats. 1993, Ch. 350, Sec. 17. Effective January 1, 1994.)