According to NERC Standard COM-002-4, what must be done when issuing an Operating Instruction?

When issuing an Operating Instruction according to NERC Standard COM-002-4, it is essential to specify time identification requirements. This requirement is critical because operational instructions can lead to significant consequences if not executed within the proper timeframe. Clearly indicating the timing associated with the instruction ensures that all personnel understand when actions are to be taken, which is vital for maintaining system reliability and safety.

By adhering to this standard, operators create a structured communication protocol that enhances clarity and reduces the risk of misinterpretation. Such precision is necessary in high-stakes environments where timing can affect the stability of the grid and overall system performance.

The other options do not align with the standard's emphasis on clarity and certainty in operational communications. For example, using any language the personnel prefer could lead to misunderstandings if terminology is not standardized. Requiring all instructions to be documented in hard copy limits flexibility, especially in environments where digital communication may be more efficient. Furthermore, limiting communication to written format only can hinder real-time responsiveness, which is critical in dynamic operational environments.