Sec. 21.110.  INVESTMENT OF FUNDS.  (a)  The department may invest the development fund and, in making the investments, is governed by the provisions of Chapter 401, Acts of the 60th Legislature, Regular Session, 1967.
(b)  The department may invest the interest and sinking fund only in direct obligations of the United States or in obligations the principal and interest of which are guaranteed by the United States.
Acts 1975, 64th Leg., p. 1405, ch. 545, Sec. 1, eff. Sept. 1, 1975.