In submitting this state's certificate of ascertainment as required by 3 U.S.C. 6, the governor shall certify this state's electors and state in the certificate:

1. The electors shall serve as electors unless a vacancy occurs in the office of elector before the end of the meeting at which elector votes are cast, in which case a substitute elector shall fill the vacancy; and

2. If a substitute elector is appointed to fill a vacancy, the governor shall submit documentation of the vacancy, the method by which the vacancy was filled, and the names on the final list of this state's electors.