Permitted nonresidential uses and legal nonconforming nonresidential uses, but not including home occupations, places of worship, libraries, museums, social clubs or societies or day nurseries, may display one sign or bulletin board pertaining to the use of property, having a total face area of not more than 12 square feet, and not projecting beyond the principal building of such use to which they are attached more than 12 inches, except that where such nonresidential uses are set back from property lines the sign may be in the ground, provided that such ground signs shall not exceed 12 square feet in total face area, shall not exceed four feet in height, and shall be no nearer than 10 feet from the nearest point of sign to any property line. If such freestanding signs face substantially at right angles to the road and/or display in more than one direction, they shall have a face area of not more than eight square feet per side, with no more than two sides.