The operator shall immediately contact MSHA at once without delay and within 15 minutes at the toll-free number, 1-800-746-1553, once the operator knows or should know that an accident has occurred involving:

1. (a) A death of an individual at the mine;
2. (b) An injury of an individual at the mine which has a reasonable potential to cause death;
3. (c) An entrapment of an individual at the mine which has a reasonable potential to cause death; or
4. (d) Any other accident.

[74 FR 68919, Dec. 29, 2009]