The use of metal, asphalt, concrete, and other types of below ground burial vaults or graveliners purchased at private expense in the Cemetery is required. Neither the superintendent nor any Cemetery employee shall be involved in making these arrangements. Cremains are not subject to this regulation; however, the urn must be of quality craftsmanship. The spreading of ashes shall be approved by the superintendent.
13 Tex. Admin. Code § 71.13