(a)(1) The notice of approval will be accompanied by a photograph of
an approval plate, bearing the emblem of Mine Safety and Health
Administration, the name of the complete assembly, the name of the applicant,
and spaces for the approval number, serial number, and the type or model of
machine.
(2) An extension of approval will not affect the original
approval number except that the extension number shall be added to the
original approval number on the approval plate. (Example: Original approval
No. 2G-3000; seventh extension No. 2G-3000-7.)
(b) The applicant shall reproduce the design on a separate plate,
which shall be attached in a suitable place, on each complete assembly to
which it relates. The size, type, location, and method of attaching an
approval plate are subject to MSHA's concurrence. The method for affixing the
approval plate shall not impair any explosion-proof feature of the
equipment.
(c) The approval plate identifies as permissible the machine or
accessory to which it is attached, and use of the approval plate obligates
the applicant to whom the approval was issued to maintain in his plant the
quality of each complete assembly and guarantees that the equipment is
manufactured and assembled according to the drawings, specifications, and
descriptions upon which the approval and subsequent extension(s) of approval
were based.
(d) A completely assembled approved machine with an integral dust
collector shall bear an approval plate indicating that the requirements of
Part 33 of this chapter (Bureau of Mines Schedule 25B),
have been complied with. Approval numbers will be assigned under each part
of such joint approvals.
[33 FR 4660, Mar. 19, 1968, as amended at 43 FR 12314, Mar. 24, 1978]
