In order to carry out purposes and provisions of this Article, the said Director of Public Health and all his authorized officers, agents and employees shall have the right at any time and at all times to enter upon or into the premises of any producer, processor, vendor or distributor of milk, cream or milk food products and imitations thereof authorized under the provisions of this Article, and any refusal upon the part of such producer, processor, vendor or distributor to allow such entry and such inspection as may be required and directed by the said Director of Public Health may be punished by the revocation of the permit of such producer, processor, distributor or vendor by the said Director of Public Health.
The Director of Public Health and all his officers, agents and employees shall have the right and it shall be their duty to enter and have full access, egress and ingress to all places where milk, cream and milk food products and imitations thereof are stored and kept for sale, and to all automobiles, motor trucks or other vehicles, railroad cars, streamboats, or conveyances of every kind used for the conveyance or transportation or delivery of milk, cream or milk food products and imitations thereof for the purpose of consumption in the City and County of San Francisco.
It shall be unlawful for any person, or persons, firm or corporation to obstruct or interfere with the said Director of Public Health or any officer, agent or employee of said Director of Public Health in the performance of any of the duties required by this Article.