At the time of making a sale or receiving the initial deposit on the sale of grave space, niche, or mausoleum crypt, the cemetery company shall deliver to the person to whom the sale is made, or who makes the deposit, an instrument in writing which shall specifically state that the net income of the care and maintenance trust fund must be used solely for the care and maintenance of the cemetery, for reasonable costs of administering the care and maintenance and for reasonable costs of administering the trust fund. This information may be included in the sales contract.