Every person who, not being a student at such school, or not being a teacher, school administrator, or employee at such school or not being at such school at the invitation of a teacher, school administrator, or employee of such school, shall loiter within any school building at a time when such school is in regular or special session or one hour before or one hour after the regular or special session, and who fails promptly to leave such school building after being requested to do so by a police officer, a teacher at such school, or the principal or vice principal at such school, or who shall fail to remain out of such school building after having left the building pursuant to such request, shall be guilty of the offense of vagrancy, and upon conviction thereof shall be punished by a fine of not more than three hundred dollars, or by imprisonment of not more than ninety days, or by both such fine and imprisonment. (Ord. 291 § 1, 1971)