(a) The purpose of the investigations made under this part is to aid
in the development and use of electric lamps, other than standard cap lamps,
that may be used in mines, especially in mines that may contain dangerous
proportions of methane.
(b) This part supersedes Schedule 10B, issued under date of June 1,
1932, and Schedule 11A, issued under date of January 13, 1936, and goes into
effect May 17, 1938.
(c)(1) Electric lamps and flashlights that meet the requirements set
forth in this part will be termed "permissible" by MSHA, and if actively
marketed will be listed as such in publications relating to permissible
equipment, in order that State mine inspection departments, compensation
bureaus, mine operators, miners, and others interested in safety equipment
for mines may have information in regard to electric lamps and flashlights
approved by MSHA.
(2) MSHA May approve electric lamps and flashlights that
incorporate technology for which the requirements of this part are not
applicable if MSHA determines by testing that the electric lamps or
flashlights are as safe as those which meet the requirements of this
[Sched. 10C, May 17, 1938, as amended at 5 FR 3467, Aug. 30, 1940; 54 FR
30513, July 20, 1989]