(1) Upon payment of the purchase price, including the amount fixed as a proportionate contribution for endowed care, there may be included in the deed of conveyance, or by separate instrument, an agreement to care, in accordance with the plan adopted, for the cemetery and its appurtenances to the proportionate extent the income received by the cemetery authority from the contribution permits.
(2) Upon the application of an owner of any plot, and upon the payment by the owner of the amount fixed as a reasonable and proportionate contribution for endowed care, a cemetery authority may enter into an agreement with the owner for the care of the plot of the owner and its appurtenances.