49 CFR § 180.201
Applicability
November 18, 2020
This subpart prescribes requirements, in addition to those contained in parts 107, 171, 172, 173, and 178 of this chapter, for the continuing qualification, maintenance, or periodic requalification of DOT specification and exemption cylinders and UN pressure receptacles.
[71 FR 33894, June 12, 2006]