It shall be unlawful for any person, firm or corporation to use human discharges or excrement, or any water containing any human discharges or excrement, or the waters of any well, spring, pond or creek, which receives the discharges of any sewer or drain, or which by any means whatever has become polluted with sewage discharges, for the purpose of irrigating or sprinkling vegetables used for human consumption.
It shall be unlawful for any person, firm or corporation to bring into the City and County of San Francisco, or to produce, sell, offer for sale or have in his or their possession for sale for human consumption in the City and County of San Francisco, without first obtaining a license from the Department of Public Health, to produce, sell, or offer for sale, vegetables for human consumption; and further they shall also be required to have a certificate by the Department of Public Health that said vegetables are produced in a manner that does not violate any of the provisions of this Section, and that the same are being handled and transported in wagons and containers satisfactory to the Department of Public Health, and said wagons and containers shall bear the legend "Inspected by the Department of Public Health, San Francisco, California," before a license for their operation is issued.