It shall be unlawful for any person, firm or corporation operating any bakery or place where bread for human consumption is baked for sale to the public, or for any person, firm or corporation who sells or exposes such bread for sale, to knowingly sell or otherwise dispose of any bread for other than human consumption which was wholesome and suitable for such use at the time it was baked and of the standard weight as now established or as may be hereafter established by ordinance of the City and County of San Francisco, until after the expiration of a period of five days from the time such bread was baked.
No bread baked for human consumption which was suitable for such use at the time it was baked and of the standard weight as established by ordinance shall be sold for other than human consumption until such bread has been offered and exposed for sale to the public for human consumption for a period of not less than three days.
Every person, firm or corporation selling or offering for sale any bread for human consumption which at the time of such sale or offering for sale is more than 48 hours old, excepting Sundays or Holidays, shall cause such bread to be indicated as more than 48 hours old either by written or printed label or placard clearly announcing such fact.