By what time must BA ABC act to eliminate an IROL violation discovered at 12:30 on July 1?

When addressing the requirement to eliminate an IROL (Interconnection Reliability Operating Limit) violation, it is essential to understand the timeline mandated by NERC standards. Once an IROL violation is identified, the responsible Balancing Authority (BA) must take corrective action within specific timeframes to ensure the reliability of the electric grid.

In this scenario, if the violation was discovered at 12:30 on July 1, the NERC standards typically allow for a timeframe that is based on stringent operational requirements. Generally, the BA must eliminate the violation as quickly as possible, and the compliance window is defined by specific hours after the discovery of the violation.

In this case, the required timeframe for action is typically one hour. Therefore, if the violation was identified at 12:30, the BA would need to act by 13:30 (1:30 PM) on the same day to adhere to the necessary compliance period, thus ensuring the reliability of operations.

The correct choice reflects this understanding of time-sensitive action required in response to a discovered IROL violation.