(a) Each segment of metallic pipe that replaces pipe removed from a buried or submerged pipeline because of external corrosion must have a properly prepared surface and must be provided with an external protective coating that meets the requirements of section 255.461 of this Part.

(b) Each segment of metallic pipe that replaces pipe removed from a buried or submerged pipeline because of external corrosion must be cathodically protected in accordance with this Part.

(c) Except for cast iron or ductile iron pipe, each segment of buried or submerged pipe that is required to be repaired because of external corrosion must be cathodically protected in accordance with this Part.

(d) Whenever the annual electrical testing required by section 255.465(a) of this Part reveals that the pipeline or segment of pipeline does not meet the cathodic protection criteria required by section 255.463 of this Part, the operator must complete action to reestablish cathodic protection to the required level prior to the next annual testing or within one calendar year.

(e) When an area of active corrosion is identified, the operator shall provide cathodic protection to the level required by section 255.463 of this Part within one calendar year or replace the section of pipeline within two calendar years.