Utilities. All new structures erected after the enactment of this chapter in the MT Mass Transit Overlay District shall be served by public sewer and public water, if the applicable code or ordinance otherwise requires that such structures be served by public sewer and public water and all new utilities shall be underground; provided, however, that the foregoing shall not require that any structures, wires, guy wires, cables, catenary poles, or similar equipment associated with transportation functions be located underground.