Every health permit and/or alphabetical grade card issued shall be kept posted in a conspicuous place in the establishment for which the permit is issued. The health officer shall prescribe the location in or on the establishment where such permit shall be kept posted. Alphabetical grade cards shall be posted in the front window of the establishment so as to be clearly visible to patrons entering the establishment, or in a display case mounted on the outside of the front door, or in a display case mounted on the outside front wall of the establishment, within five feet of the front door, or in some other location clearly visible to patrons entering the establishment, which has been approved by the health officer. The alphabetical grade card shall be protected from damage by weather conditions and shall not be defaced, marred, or camouflaged or hidden so as to prevent the general public from observing it. (Ord. 1930 § 1, 1981; Ord. 855 § 2; prior code § 15.16).