Tex. Natural Resources Code § 161.215: PURCHASE OF LAND.

Land purchased by the board shall be acquired at the lowest price that can be obtained in the opinion of the board, taking into consideration the quality, location, natural advantages, and improvements of the land. The land shall be paid for in cash and shall be clear of all liens and shall be a part of the fund.

Acts 1977, 65th Leg., p. 2666, ch. 871, art. I, Sec. 1, eff. Sept. 1, 1977.