What indicates that the crew is allowed to perform a (M) procedure listed in the MEL?

The indication that the crew is allowed to perform a (M) procedure listed in the Minimum Equipment List (MEL) is reflected in the "Flight Crew Deferral Item" column, which shows "YES." This designation signifies that the procedure is approved for the crew to follow while still ensuring compliance with regulatory standards and safety protocols.

This is critical because the MEL provides guidance on which items can be deferred for flight, and the specific notation in this column confirms the authority of the flight crew to proceed under those conditions. It ensures that the crew has clear instructions on how to operate the aircraft safely even with certain equipment inoperative.

The other options do not specifically denote permission for the crew to execute an (M) procedure. Maintenance status, special training, and weather conditions might contribute to overall operational safety and performance but do not directly influence the authorization to follow the MEL procedures outlined by the manufacturer or regulatory authorities.