NYS Vault
§ 201.6 Sale of outer containers
(a) A cemetery corporation may not compel the use of any particular outer enclosure, except that a cemetery may require the use of a concrete burial vault, or, at the option of the customer, a concrete grave liner under the following conditions and restrictions:
(1) the customer must have purchased a lot after January 1, 1985;
(2) the requirement must be stated prominently in writing and a written statement must be given to the customer in advance of the signing of the agreement to purchase a grave or lot;
(3) only a concrete grave liner or a concrete burial vault of the type and grade which conforms to the following minimum specifications may be required:
–1 1/2′′ average sidewall
–2′′ top
–2′′ bottom (whether top seal or plate of air seal) –4,500 pounds per square inch
–Sealed
(ii) concrete grave liner
–1 1/2′′ average top and bottom
–1′′ sidewall
–minimum of two holes in or near bottom to allow discharge of water –4,500 pounds per square inch
–not sealed
(4) should a lot owner, a person with burial rights or a representative of one about to be interred express objection to the use of the required concrete burial vault or grave liner at the time of interment based upon a religious belief, the cemetery must, without question, cancel the requirement that a concrete vault or concrete grave liner be used; provided, however, that the cemetery may impose at the time of interment a reasonable fee for the periodic refilling of the grave after receiving approval of the Cemetery Board for that fee;
(5) a plot owner may purchase the prescribed grave liner from any source including the cemetery; and
(6) a cemetery may not sell burial vaults.
Text taken from NYS Division of Cemetries