Tex. Parks and Wildlife Code § 21.105: INTEREST AND SINKING FUND.

The Texas park development bonds interest and sinking fund, referred to as the "interest and sinking fund," is created to be used exclusively for:

(1) paying the principal of Texas Park Development Bonds as they mature;

(2) paying the interest on the bonds as it comes due; and

(3) paying exchange and collection charges in connection with the bonds.

Acts 1975, 64th Leg., p. 1405, ch. 545, Sec. 1, eff. Sept. 1, 1975.