(1) The Council finds that:
(a) An emergency has been created by a substantial increase in the number and in the seriousness of crimes committed by minors against persons and property within the City, and this has created a menace to the preservation of public peace, safety, health, morals and welfare;
(b) The increase in juvenile delinquency has been caused in part by the large number of minors who are permitted to remain in public places and in certain establishments during night hours without adult supervision;
(c) The problem of juvenile delinquency can be reduced by regulating the hours during which minors may remain in public places and in certain establishments without adult supervision, and by imposing certain duties and responsibilities upon the parents or other adult persons who have care and custody of minors.