30 CFR § 20.11
Material required for MSHA records.
In order that MSHA may know exactly what it has tested and approved, detailed
records are kept covering each investigation. These include drawings and
actual equipment, as follows:
(a) Drawings. The original drawings submitted with the
application for the tests and the final drawings which the manufacturer must
submit to MSHA before approval is granted, to show the details of the lamp as
approved, are retained. These drawings are used to identify the lamp and its
parts in the approval and as a means of checking the future commercial
product of the manufacturer.
(b) Equipment. (1) If MSHA so desires, parts of the lamps
which are used in the tests will be retained as a permanent record of the
investigation and of the lamps submitted.
(2) If the lamp is approved, MSHA will require the
manufacturer, as soon as his first manufactured lamps are available, to
submit one complete lamp, with the approval plate attached, as a record of
his commercial product.