053-4 Wyo. Code R. § 75.1403-1
(a) Sections 75.1403 - 2 through 75.1403 - 11 set out the criteria by which an authorized representative of the Secretary will be guided in requiring other safeguards on a mine-by-mine basis under S 75.1403. Other safeguards may be required.
(b) The authorized representative of the Secretary shall in writing advise the operator of a specific safeguard which is required pursuant to S 75.1403 and shall fix a time in which the operator shall provide and thereafter maintain such safeguard. If the safeguard is not provided within the time fixed and if it is not maintained thereafter, a notice shall be issued to the operator pursuant to section 104 of the Act.
(c) Nothing in the sections in the S 75.1403 series in this subpart O precludes the issuance of a withdrawal order because of imminent danger.
053-4 Wyo. Code R. § 75.1403-1