In all cases, where, in the opinion of the Mayor, the public peace is likely to be endangered by the keeping open of premises licensed hereunder, it shall be lawful for the Mayor to issue his proclamation, under seal of the city, commanding and enjoining all persons licensed by the city to sell any of said liquors, and their servants and agents, to close their shops and places of business for such time as the Mayor shall deem necessary; and neither to sell, give away, or suffer to be drawn, any of said liquors in or about their premises during the time mentioned in said proclamation.
('71 Code, § 4-17-21)