After April 14, 1966, no agency of the state may take privately-owned property by the election or exercise of a reservation to the state acquired under the Act of June 30, 1932, ch. 320, § 5, as added July 24, 1947, ch. 313, 61 Stat. 418, and taking of property after April 14, 1966 by the election or exercise of a reservation to the state under that federal Act is void.