Whenever the Mayor determines that an emergency exists as a result of mob action or other civil disobedience, causing danger of injury to, or damages to, persons or property, he shall have power to impose, by proclamation, any or all of the following regulations necessary to preserve the peace and order of the City:
A. A curfew upon all or any portion of the City, thereby requiring all persons in such designated curfew areas to forthwith remove themselves from the public streets, alleys, parks or other public places; provided, however, that physicians, nurses and ambulance operators performing medical services, utility personnel maintaining essential public services, firemen and City authorized or requested law enforcement officers and personnel may be exempted from such curfew;
B. Order the closing of any business establishments anywhere within the City for the period of the emergency, such businesses to include, but not be limited to, those selling intoxicating liquors, cereal malt beverages, gasoline or firearms;
C. Designate any public street, thoroughfare or vehicle parking areas closed to motor vehicles and pedestrian traffic; and
D. Call upon regular and auxiliary law enforcement agencies and organizations within or without the City to assist in preserving and keeping the peace within the City. (1994 Code)