(a) Whenever a riot, general disobedience or threat of the same occurs in the City, and it is deemed necessary in order to suppress the riot or act of civil disobedience, the Mayor or acting Mayor may do the following:
(1) Declare hours of curfew for all persons. During the hours of curfew, all persons shall be at their homes and shall not be on the streets, alleys or other public areas of the City. The curfew shall be declared in a proclamation of the Mayor, which proclamation shall be delivered to the Chief of Police who shall then see that the proclamation is delivered to all news media in the City. He or she shall also use public address systems throughout the City and immediately notify the public of the proclamation and curfew and warn the public that any violation of the curfew shall be deemed a misdemeanor and violators will be arrested.
(2) Declare any business establishment to be closed and remain closed until further order. No person shall refuse to close such establishment and keep it closed after receiving notice to do so. The Mayor shall issue a proclamation which shall be delivered to the Chief of Police, who shall inform businesses of the proclamation.
(b) The Chief of Police may temporarily close any streets, alleys and other public ways in the City to the public whenever, in his or her opinion, it is necessary in order to maintain the peace of the community.
(c) No person shall remain present at the place of any riot or unlawful assembly after the same has been ordered to disperse by the police or any other lawful authority, except those public officers and persons assisting them in attempting to disperse the same.
(1974 Code Sec. 9.140)