(a) A letter of certification may be issued by MSHA for a component
intended for incorporation in a complete machine or accessory for which an
approval may be subsequently issued. A letter of certification will be
issued to an applicant when a component has met all the applicable
requirements of this part. Included in the letter of certification will be
an assigned MSHA certification number that will identify the certified
(b) A letter of certification will be accompanied by a list of
drawings, specifications, and related material covering the details of design
and construction of a component upon which the letter of certification is
based. Applicants shall keep exact duplicates of the drawings,
specifications, and descriptions that relate to the component for which a
letter of certification has been issued; and the drawings and specifications
shall be adhered to exactly in production of the certified component.
(c) A component shall not be represented as certified until the
applicant has received MSHA's letter of certification for the component.
Certified components are not to be represented as "approved" or "permissible"
because such terms apply only to completely assembled machines or