Upon such sales of unappropriated state land to a purchaser procured by any licensed real estate broker and the payment of the purchase price in the amount offered by such broker in behalf of the purchaser, the commissioner of general services is authorized to pay, subject to such terms and conditions as the commissioner may prescribe, a commission to such broker out of monies available therefor. Uniform rates of commission shall, from time to time, be fixed by the commissioner but shall not exceed six percentum of the purchase price. No commission shall be paid for the procuring of any sale unless (1) written authority of the broker to make such offer on a form acceptable to the commissioner, signed by the person for whom he is acting, shall be filed with the commissioner before the day of the sale and unless (2) the broker shall furnish to the commissioner evidence in such form and extent as he may require establishing that the purchaser was procured as the result of the broker's services. In no event shall a broker who is paid a commission by the commissioner as herein provided accept any other commission or fee from any person or source for brokerage services relating to the sale of such unappropriated state land.
N.Y. Pub. Lands Law § 33