It shall be unlawful for any owner or operator of any establishment within the scope of this article, located within the State of California, to post or maintain posted on any outdoor or outside advertising sign pertaining to such establishment, any rates for accommodations in such establishment unless the sign shall have posted thereon the rates charged for all rooms, or other rental units or accommodations offered for rental, the number of rooms or other rental units offered for rental at each rate, and the number of persons accommodated at the rate posted. All posted rates and descriptive data required by this article shall be in type and material of the same size and

prominence as the aforesaid data. This section shall not be held to be complied with by signs stating the rate per person or bearing the legend “and up.”