When must the Director of MHST and the district mine inspector be notified?

The requirement to notify the Director of the Mine Health and Safety Technology (MHST) and the district mine inspector immediately after an explosion, death, or serious personal injury is grounded in the need for prompt communication regarding significant incidents that can impact the safety and health of workers. This immediate notification allows for quick response actions, including investigations and the implementation of necessary safety measures to prevent further incidents.

By establishing this requirement, regulations ensure that authorities are aware of critical situations as they occur, enabling them to mobilize resources for safety interventions and potentially preventing similar events in the future. Moreover, such prompt reporting is essential for compliance with mining regulations and can significantly affect the operational stability of the mine, highlighting the importance of safety protocols in the mining industry. The other options do not provide sufficient urgency or relevance in the context of serious incidents that compromise worker safety and require immediate attention.