Which of the following is a key requirement before engaging in tables IX and X?

The key requirement before engaging in tables IX and X is conducting the PMI, or Pre-Mission Inspection. This step is crucial because it ensures that all equipment, systems, and personnel are properly prepared and capable of executing the tasks associated with the tables. The PMI serves to identify any potential issues or deficiencies that need to be rectified prior to mission execution, facilitating a safer and more effective operational environment.

While attending a leadership seminar, completing a Safety Stand-Down, or passing a physical fitness test may provide valuable training and preparation, they do not specifically address the immediate operational readiness required for engaging in tables IX and X. The focus of the PMI is directly related to the specific requirements of the missions involved, making it the most critical step in the process.