What information is essential when requesting a change to a computer assigned code?

Request identification from the flight plan is critical when requesting a change to a computer-assigned code because it serves to verify the identity of the aircraft and its intended operation. This identification ensures that the change request is anchored in the official flight data and aids in maintaining accurate situational awareness for air traffic control. By tying the request to a specific flight plan, controllers can process and manage codes appropriately, ensuring the safety and efficiency of the airspace system.

While the position of the aircraft, current weather conditions, and track history may provide useful context regarding the flight and its operational environment, they do not directly facilitate the processing of a change to the assigned code. The focal point must always be the accurate identification of the flight to ensure proper tracking and coordination within the air traffic control system.