49 CFR § 173.124
Desensitized explosives that
(i) When dry are Explosives of Class 1 other than those of compatibility group A, which are wetted with sufficient water, alcohol, or plasticizer to suppress explosive properties; and
(ii) Are specifically authorized by name either in the Hazardous Materials Table in § 172.101 of this subchapter or have been assigned a shipping name and hazard class by the Associate Administrator under the provisions of—
(A) A special permit issued under subchapter A of this chapter; or
(B) An approval issued under § 173.56(i).