Upon the declaration of a state of snow emergency, the chief of police may issue such temporary emergency regulations as he may deem necessary to regulate or prohibit, during such emergency, the parking of vehicles and the direction of traffic on any of the streets of the city and shall give such notice thereof as he shall deem proper. During such “snow emergency” no owner or driver of a vehicle shall cause, permit, allow or suffer any vehicle owned or driven by him to be parked or driven contrary to the regulations of the chief of police. When the conditions creating the emergency no longer exists, notice shall be given of the termination of the temporary emergency regulations in such a manner as may be deemed proper by the chief of police. (1961 Supp., § 10.123)