(a) Approved products shall be subject to periodic audits by MSHA for
the purpose of determining conformity with the technical requirements upon
which the approval was based. Any approved product which is to be audited
shall be selected by MSHA and be representative of those distributed for use
in mines. The approval-holder may obtain any final report resulting from
(b) No more than once a year except for cause, the approval-holder,
at MSHA's request, shall make an approved product available at no cost to
MSHA for an audit to be conducted at a mutually agreeable site and time. The
approval-holder may observe any tests conducted during this audit.
(c) An approved product shall be subject to audit for cause at any
time MSHA believes that it is not in compliance with the technical
requirements upon which the approval was based.