For the purpose of this title, additional types of signs are distinguished and defined and shall be subject to the regulations specified for each. The word “illuminated” when used in reference to signs shall mean giving forth direct artificial light, and shall not refer to light cast upon a sign from an outside source. Where the aggregate area of signs is limited, all faces of a sign shall be included in the calculation. Where two advertising signs are located on the same supporting members and the two faces of the signs are at no point more than two feet from one another, each face shall be considered a single sign. (Prior gen. code § 8-60.61)