Maryland Code, Environment § 15-406

(a) The operator of each coal mine shall report monthly to the district mine inspector, on forms the Bureau provides, all required information regarding any fatal and serious accident that has occurred in and about the mine.

(b) If any district mine inspector receives notice that a fatal accident has occurred at any mine, he shall go immediately to the mine to investigate the cause of the accident and report in writing to the Bureau. A copy of the report shall be sent to the operator of the mine. The district mine inspector may require the attendance of witnesses, and administer oaths and affirmations to them. If any person neglects or refuses to obey the summons of the inspector, or to testify, except when his refusal is privileged, the inspector shall certify the person for neglect or refusal to the circuit court for the county in which the investigation is held. The court may punish the neglect or refusal as a contempt. The costs of any investigation shall be paid by the county in which the accident may occur, on the warrant of the Director of the Bureau.