30 CFR § 14.11
(a) MSHA may revoke for cause an approval issued under this Part if
the conveyor belt--
(1) Fails to meet the technical requirements; or
(2) Creates a danger or hazard when used in a mine.
(b) Prior to revoking an approval, the approval holder will be
informed in writing of MSHA's intention to revoke. The notice will--
(1) Explain the reasons for the proposed revocation; and
(2) Provide the approval holder an opportunity to demonstrate or
achieve compliance with the product approval requirements.
(c) Upon request to MSHA, the approval holder will be given the
opportunity for a hearing.
(d) If a conveyor belt poses an imminent danger to the safety or
health of miners, an approval may be
immediately suspended without written notice of the Agency's intention