Under what condition does a directive issued by an ISHR cease to be effective?

A directive issued by an Industrial Safety and Health Representative (ISHR) ceases to be effective when it is withdrawn in writing by the ISHR or inspector. This condition emphasizes the importance of maintaining official documentation and communication regarding directives in health and safety contexts. The withdrawal in writing serves as a formal procedure, ensuring that all parties involved are aware of the change in status of the directive.

This process guarantees that proper protocol is followed, aligning with safety regulations and ensuring that workers are informed about any changes to directives that could affect their health and safety. Other choices involve scenarios where a directive might not necessarily lose its effectiveness, such as a mere request from the mine owner or a transition between inspectors, which do not inherently lead to the withdrawal or change of the directive unless specified in writing.