Under what condition must the SSE appoint another person to perform specific duties?

The condition requiring the SSE (Site Senior Executive) to appoint another person to perform specific duties is grounded in ensuring the safety and effective management of workplace operations. When the individual appointed actively supervises coal mine workers, it signifies that they will oversee critical operations, which is essential for maintaining safety standards and compliance with regulations in a potentially hazardous environment like a coal mine.

Active supervision denotes an ongoing responsibility to monitor and manage workers, facilitating immediate responses to safety incidents, operational issues, or compliance needs. This requirement is particularly vital in high-risk industries, where direct oversight can prevent accidents and ensure that operations are conducted within established safety protocols.

In contrast, the other choices do not align with the regulatory requirements for safe supervision. The affiliation of the person with a union, their previous experience, or their willingness to accept responsibilities, while relevant in some contexts, do not specifically address the critical requirement of active supervision necessary for ensuring a safe working environment in coal mining operations.