Persons confined in the City Jail under a final judgment of imprisonment rendered in a criminal action or proceeding may be required to perform labor on the public streets or other public property or works within the city under direction of the Chief of Police. The phrase "streets or other public property or works within the city" as used in this section, includes among other things, clerical and menial labor in the City Jail.
(`78 Code, § 1.08.030.)