(a) Each buried or submerged component that is subject to external corrosive attack must be protected from external corrosion by —   (1) Material that has been designed and selected to resist the corrosive environment involved; or   (2) The following means:   (i) An external protective coating designed and installed to prevent corrosion attack and to meet the requirements of §192.461 of this chapter; and   (ii) A cathodic protection system designed to protect components in their entirety in accordance with the requirements of §192.463 of this chapter and placed in operation before October 23, 1981, or within 1 year after the component is constructed or installed, whichever is later.

(b) Where cathodic protection is applied, components that are electrically interconnected must be protected as a unit.

[Amdt. 193-2, 45 FR 70407, Oct. 23, 1980, as amended at 47 FR 32720, July 29, 1982]