(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. (1) the customer must have purchased a lot after January 1, 1985;
2. (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. (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. (i) concrete burial vault

      —1½″ average sidewall

      —2″ top

      —2″ bottom (whether top seal or plate of air seal)

      —4,500 pounds per square inch

      —Sealed

   2. (ii) concrete grave liner

      —1½″ 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. (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. (5) a plot owner may purchase the prescribed grave liner from any source including the cemetery; and
6. (6) a cemetery may not sell burial vaults.