46 C.F.R. § 128.210 Class II vital systems—materials.
Title 46 - Shipping
Except as provided by §§128.230 and 128.240 of this subpart, instead of complying with part 56 of this chapter, materials used in Class II vital piping-systems may be accepted by the cognizant OCMI or the Commanding Officer, Marine Safety Center, if shown to provide a level of safety equivalent to materials in subpart 56.60 of this chapter.
Title 46: Shipping
PART 128—MARINE ENGINEERING: EQUIPMENT AND SYSTEMS
Subpart B—Materials and Pressure Design
§ 128.210 Class II vital systems—materials.

