46 C.F.R. § 64.57
Acceptance of pressure relief devices
A pressure relief device for an MPT must be—
(a) From a supplier accepted under chapter I of title 46, Code of Federal Regulations; or
Accepted suppliers are listed in CG-190, Equipment list.
(b) Accepted by the Coast Guard in accordance with the procedures in § 50.25-10 of this subchapter.