Upon receipt of satisfactory proof with respect to a referendum that the conditions specified in § 218(d)(3) of the federal Social Security Act, 42 U.S.C. § 418(d)(3), have been met, the governor shall certify to the secretary that the conditions were met. Proper steps to give effect to the results of the referendum shall be taken by the general treasurer within a period of two (2) years of the date of the referendum.