The Secretary or the Secretary's designee may, on a case-by-case basis, when circumstances warrant, require the application of this subpart C with respect to a substance not listed in appendix I to this subpart C that would create thermal or overpressure effect in excess of that listed in § 51.203.
[61 FR 13334, Mar. 26, 1996]
source: 44 FR 40861, July 12, 1979, unless otherwise noted.
cite as: 24 CFR 51.207