(a) Vacancies. The office of councilmember shall become vacant upon his or her death, resignation, removal from office in any manner authorized by law or by this Charter or by forfeiture of his or her office. A vacancy shall also exist whenever a qualified person has not been elected to a position of councilmember under the provisions of this Charter.
(b) Forfeiture of Office. A councilmember shall forfeit his or her office if he or she:
(1) Becomes physically or mentally incapable to perform the duties of the office of councilmember,
(2) Lacks at any time during his or her term of office any qualification for the office prescribed by this Charter or by law,
(3) Violates any express prohibition of this Charter,
(4) Is convicted of a crime involving moral turpitude, or
(5) Fails to attend three consecutive regular meetings of the Council without being excused by the Council either before or after failure of attendance.
(c) Filling of Vacancies. A vacancy in the office of councilmember shall be filled by a majority vote of the remaining councilmembers, who within thirty (30) days after the occurrence of the vacancy, shall appoint a qualified person to fill the vacancy. Said appointee shall serve until the next regular City election. At the next regular election the voters shall elect a person as provided in Article VII of this Charter to serve the unexpired term, if any. If Council fails to fill any such vacancy within thirty days following the occurrence of the vacancy, the election authorities shall call a special election to fill the vacancy, to be held not sooner than 90 days and not later than 120 days following the occurrence of the vacancy and to be otherwise governed by the provisions of Article VII. Notwithstanding the requirement in Section 3.11 that a quorum of the Council consists of four members, if at any time the membership of the Council is reduced to less than four, the remaining members may by majority action appoint additional members to raise the membership to four.