A professional nameplate affixed to the door or adjacent wall of residential premises used in conformance with subsection 22-42.2, not to exceed eight (8) inches by twenty (20) inches.

A memorial sign or tablet, or a sign indicating the name of a building, or the date of its erection, when cut into any masonry surface or when constructed of bronze or other noncombustible material.

Signs for public convenience and welfare erected by or on behalf of the United States, the State, the County and the Borough, legal notices posted by approved governmental official or their designees, railroad crossing signs or other signs as required by law.