Section 7
SEC. 7. All persons engaged in the retail sale of the commodities mentioned in section one hereof the price of which has been placed under control shall post in a conspicuous place in their establishment, or store or stall a list of all such commodities displayed and offered for sale with their corresponding prices, and, in addition, shall attach to said merchandise price tags in such manner as to be within the plain view of the public. No person engaged in the retail trade shall refuse to sell any such merchandise.