The revenue limit of § 18 of this Article may be exceeded only if all of the following conditions are met: (1) The governor requests the general assembly to declare an emergency; (2) the request is specific as to the nature of the emergency, the dollar amount of the emergency, and the method by which the emergency will be funded; and (3) the general assembly thereafter declares an emergency in accordance with the specifics of the governor’s request by a majority vote for fiscal year 1981-1982, thereafter a two-thirds vote of the members elected to and serving in each house. The emergency must be declared in accordance with this section prior to incurring any of the expenses which constitute the emergency request. The revenue limit may be exceeded only during the fiscal year for which the emergency is declared. In no event shall any part of the amount representing a refund under § 18 of this Article be the subject of an emergency request.