(a)   The Mayor or City Manager may declare a state of emergency within the City upon determining that property, real or personal, whether it be public or private, is in danger of being damaged or destroyed; or that the health, safety and welfare of the inhabitants of the City is in jeopardy; or that gatherings of rioters, protesters or demonstrators constitute a threat to the peace, quiet, and good order of the City.
   (b)   At such time that a state of emergency is declared and until time as the emergency is declared at an end, curfew shall prevail within the City between the hours of 9:00 p.m. and 6:00 a.m.
   (c)   During the time that the curfew is in effect, no person shall loiter upon the streets, avenues, parks or other public place within the City and no person shall be upon the streets, avenues, alleys, parks or other public place within the City without being able to show just cause and to give a reasonable account of himself.
   (d)   All bars, taverns, restaurants, filling stations and other business establishments shall be closed during the hours of the curfew.
   (e)   Whoever violates this section is guilty of a minor misdemeanor.