The check-off system created by section 4¹ of this act shall be the only such check-off allowed on Pennsylvania State income tax return forms seeking voluntary contributions from tax refunds. In the event the wild resource conservation fund shows a net loss, after the deduction of administrative cost by the Department of Revenue, for two consecutive years, and the Secretary of the Budget and the State Treasurer certify to the General Assembly that such loss has in fact occurred then the board and all of its powers and duties shall terminate and go out of existence within 60 days of the certification.