I am interested in finding information on the regulation of sign area related to the distance the sign is set back from the street. I am mainly interested in wall signs or signs on buildings as opposed to freestanding pole signs. The city I am working with allows 3 square feet of sign area for each lineal foot of building frontage. This seems too large for signs on buildings with no setback. I am looking for some sort of sliding scale formula to adjust the allowed area of a sign based on its distance from the street or front property line.