To the extent practicable, underground, electric, communication, gas, and cable facilities shall be installed in a common trench when new construction is, or can without undue difficulty, be made simultaneously. Every reasonable effort shall be made to use joint occupancy utility poles to accommodate electric, communication and cable television facilities when new overhead construction occurs.
N.Y. Comp. Codes R. & Regs. Tit. 16 § 604.7