(1) A cemetery authority that enters into prearrangement contracts for the sale of unconstructed crypts, niches, or undeveloped property, or that conveys undeveloped property by gift, shall maintain an adequate inventory of constructed crypts or niches and developed property. The inventory shall be a minimum of ten percent of the unconstructed or undeveloped property sales. The inventory shall be equal or better in quality than the unconstructed crypts or niches, or undeveloped property if they were constructed or developed.

(2) If the death of a purchaser or owner of an unconstructed crypt, niche, or undeveloped property occurs before the property is constructed or developed, the cemetery authority shall provide a constructed crypt, niche, or developed property of equal or better quality without additional cost or charge.

(3) If two or more unconstructed crypts, niches, or undeveloped properties are conveyed with the intention that the crypts, niches, or properties shall be contiguous to each other or maintained together as a group and the death of any one purchaser or owner in such group occurs before the unconstructed crypts, niches, or undeveloped property is developed, the cemetery authority shall provide additional constructed crypts, niches, or developed property of equal or better quality, contiguous to each other or together as a group, as originally intended, to other purchasers or owners in the group without additional cost or charge.

(4) The representative of the deceased purchaser may agree to the placement of the decedent in a temporary crypt, niche, or grave until the construction is completed and the decedent is placed in the new crypt, niche, or grave.

(5) Prearrangement sales of unconstructed crypts, niches, or undeveloped property must meet the requirements of RCW 68.46.030.