It shall be unlawful for any minor under 18 years of age to loiter, idle, wander, stroll, play in or be upon the public streets, highways, roads, alleys, parks, playgrounds, or other public grounds, public places, public buildings, or places of amusement or entertainment, or vacant lots or other unsupervised places within the city between the hours of 12:00 midnight and 6:00 a.m. the following day. The provisions of this section shall not apply to such minors when accompanied by his or her parent, guardian or other adult person having the care and custody of the minor, or when a minor is upon an emergency errand or lawful duty or employment directed by his or her parent, guardian, or other adult having the care and custody of the minor, or when attending school functions and other activities under the supervision of school authorities or organizations sponsored by parent and be upon the streets of the city while returning home from any such function or activity. (Ord. 553, Sec. 1)