30 CFR § 550.121
What must I do to protect health, safety, property, and the environment?
July 29, 2020
The Director may require additional measures to ensure the use of Best Available and Safest Technology (BAST) as identified by BSEE:
(a) To avoid the failure of equipment that would have a significant effect on safety, health, or the environment;
(b) If it is economically feasible; and
(c) If the incremental benefits justify the incremental costs.
[81 FR 18152, Mar. 30, 2016]