30 CFR § 15.1
Purpose and effective dates.
This part sets forth the requirements for approval of explosives and sheathed
explosive units to be used in underground coal mines and certain underground
metal and nonmetal gassy mines and is effective January 17, 1989. Those
manufacturers proceeding under the provisions of the previous regulation may
file requests for approval or extension of approval of explosives under that
regulation until January 17, 1990. After January 17, 1990, all requests for
approval or extension of approval of explosives or sheathed explosive units
shall be made in accordance with Subpart A and the applicable subpart of this
part. Explosives issued an approval under regulations in place prior to
January 17, 1989, and in compliance with those regulations, may continue to
be manufactured and marked as approved as long as no change to the explosive
is made.
[FR 46761, Nov. 18, 1988; 54 FR 351, Jan. 5, 1989]