(a)Permissible, as applied to a dust collector, means that it conforms to
the requirements of this part, and that a certificate of approval to that
effect has been issued.
(b)Bureau means the United States Bureau of Mines.
(c)Certificate of approval means a formal document issued by MSHA stating
that the dust collector unit or combination unit has met the requirements of
this part, and authorizing the use and attachment of an official approval
plate or a marking so indicating.
(d)Certificate of performance means a formal document issued by MSHA stating
that a dust-collecting system has met the test requirements of Subpart C of
this part and therefore is suitable for use as part of permissible units.
(e)Dust-collector unit means a complete assembly of parts comprising
apparatus for collecting the dust that results from drilling in rock in coal
mines, and is independent of the drilling equipment.
(f)Combination unit means a rock-drilling device with an integral
dust-collecting system, or mining equipment with an integral rock-drilling
device and dust-collecting system.
(g)Dust-collecting system means an assembly of parts comprising apparatus
for collecting the dust that results from drilling in rock and is dependent
upon attachment to other equipment for its operation.
(h)Applicant means an individual, partnership, company, corporation,
association, or other organization that designs and manufactures, assembles
or controls the assembly of a dust-collecting system, dust-collector unit, or
a combination unit, and seeks certification thereof.
(i)MSHA means the United States Department of Labor, Mine Safety and Health
[Sched. 25B, 25 FR 6473, July 9, 1960, as amended at 39 FR 24005, June 28,
1974; 43 FR 12317, Mar. 24, 1978]