(a) Any vacancy in the office of state senator or member of the House of Delegates shall be filled by appointment by the Governor, from a list of three legally qualified persons submitted by the party executive committee of the same political party with which the person holding the office immediately preceding the vacancy was affiliated at the time the vacancy occurred. The list of qualified persons to fill the vacancy shall be submitted to the Governor within 15 days after the vacancy occurs and the Governor shall duly make his or her appointment to fill the vacancy from the list of legally qualified persons within five days after the list is received. If the list is not submitted to the Governor within the 15-day period, the Governor shall appoint within five days thereafter a legally qualified person of the same political party with which the person holding the office immediately preceding the vacancy was affiliated at the time the vacancy occurred.

(b) In the case of a member of the House of Delegates, the list shall be submitted by the party executive committee of the delegate district in which the vacating member resided at the time of his or her election or appointment. The appointment to fill a vacancy in the House of Delegates is for the unexpired term.

(c) In the case of a state senator, the list shall be submitted by the party executive committee of the state senatorial district in which the vacating senator resided at the time of his or her election or appointment. The appointment to fill a vacancy in the state Senate is for the unexpired term, unless §3-10-1 of this code requires a subsequent election to fill the remainder of the term, which shall follow the procedure set forth in said section.