No building, portion of building, structure, construction, vehicle parking, equipment, or material storage is permitted in any required yard, except where otherwise permitted by these Regulations. Architectural features such as pilasters, chimneys, sills, cornices, eaves, windows, steps, stoops or thresholds may extend or project into the minimum required yards not more than two feet. Bus Shelters, and Public Utility Installations as permitted under Articles VI, VII, VIII, and IX of these Regulations need not conform to the minimum required yard and accessory building requirements of these Regulations. For the placement of buildings and structures the Commission, may, at its discretion, in situations where the public right of way is excessively wide, permit the front yard in General Commercial (GC), General Industrial (GI), Designed Commercial (DC) and Design Industrial (DI) zones to be measured as 60 feet from the curb line.