(a) Each operator shall maintain records or maps to show the location of cathodically protected piping, cathodic protection facilities, other than unrecorded galvanic anodes installed before August 1, 1971, and the neighboring structures bonded to the cathodic protection system.
(b) Each record or map required by subdivision (a) of this section must be retained for as long as the pipeline remains in service.
(c) Records of each test, survey, or inspection required by this Part, in sufficient detail to demonstrate the adequacy of corrosion control measures or that a corrosive condition does not exist must be retained for at least five years with the following exceptions:
(1) Operators must retain records related to subdivisions 255.465(a) and (e) and 255.475(b) of this Part for as long as the pipeline remains in service.
(2) Operators must retain records of the two most recent atmospheric corrosion inspections for each distribution service line that is being inspected under the interval in paragraph 255.481(a)(2) of this Part.