The Chief of Police may prescribe rules for the government of police officers of the city, which shall be entered in a book of Police Department rules and orders, and may be amended or revoked by the Police Chief. The rules may establish one or more divisions within the Police Department, each of which may be charged with performing one or more of the functions of the Police Department enumerated in § 31.011. Any such division shall be supervised by a qualified officer of the Police Department, who shall be responsible for the particular functions of the Police Department assigned to the particular division supervised by him. It shall be the duty of all members of the police force to comply with such rules and orders while effective.
(‘83 Code, § 31.07)