Any police commissioner or any member of the police force who shall accept any additional place of public trust or civil emolument except as a member of a community board, or who shall during his or her term of office be nominated for any office elective by the people, except a member of the police force appointed, nominated or elected to a board of education outside of the city of New York, and shall not, within ten days succeeding same, decline the said nomination, shall be deemed thereby to have resigned his or her commission and to have vacated his or her office, and all votes cast at any election for any person holding the office of police commissioner, or within thirty days after he or she shall have resigned such office, shall be void.
The foregoing provisions shall not apply to any member of the police force who, with the written authorization of the mayor, shall accept any additional place of public trust or civil emolument while on leave of absence without pay from the department.