For the purpose of this article, the following definition shall apply unless the context clearly indicates or requires a different meaning.
POLICE OFFICER. Any officer or employee of the regular Police Department of the city appointed or employed for police duties or necessary duties in the operation of the Police Department, and shall include jailers, radio operators, department clerks, employees in bureaus of records, probationary patrol officers, patrol officers, sergeants, lieutenants, captains, senior officers, detective, secretary to the Chief of Police, and other police officers of the Department performing police duties whose salaries are paid for with public funds as set up in the budget of the city for the regular Police Department, but shall not include any police commissioners, or any one employed in any other capacity not involving police duties. In case of doubt as to whether any person is a POLICE OFFICER, within the meaning of this article, the decision of the Board of Trustees shall be final.
(`90 Code, § 1-32)