Each operator shall keep records covering each leak discovered, repair made, and line break for as long as the segment of transmission line, or distribution main operating at 125 psig (862 kPa) or more in a Class 3 or 4 location, involved remains in service. (See section 255.17 of this Part.)
N.Y. Comp. Codes R. & Regs. Tit. 16 § 255.709