Each such Commissioner appointed under the terms hereof, shall, before entering upon their respective duties, take and subscribe an oath of office before the County Clerk of the Circuit or Superior Courts, and shall also take and subscribe before such Clerk the further oath or affirmation that, in any and every appointment or removal to be made by them, to or from the police force created and to be organized by them under the applicable provisions of law, they shall in no case and under no pretext appoint or remove any policemen, police officer, or other person because of any political affiliation of such person, or for any cause or reason other than that of fitness or unfitness of such person, which oath and affirmation shall be recorded and placed among the records of the court.
(‘82 Code, § 24-202)