Permitted nonresidential uses, but not including home occupations or day nurseries, may display signs pertaining to the use of property, having an aggregate total face area of not more than 30 square feet and not projecting beyond the principal building of such use to which they are attached more than 24 inches, except that where such nonresidential uses are set back from property lines, one sign may be erected in the ground, provided that such sign does not exceed five feet in height, shall be parallel to the lot frontage and shall be no nearer than 10 feet 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.