What action must a traveler take if they need to modify their itinerary after initial authorization?

When a traveler needs to modify their itinerary after it has been initially authorized, the appropriate action is to document and obtain new authorization in the Defense Travel System (DTS). Modifying a travel itinerary often involves changes such as adjusting flight times, altering accommodations, or switching travel routes, all of which must be formally approved to maintain compliance with travel policies and regulations.

Obtaining a new authorization in DTS ensures that all changes are recorded, and the updated travel plans are reviewed and approved by the necessary authorities. This step is crucial since it maintains a clear audit trail and aligns with the requirement for accountability in government travel.

Other options, such as contacting the travel agency directly or merely consulting with a supervisor, do not address the necessary formal process of documenting changes within the DTS. Canceling the entire trip and reapplying would be an inefficient approach and could create unnecessary complications in managing travel plans. Thus, the requirement to obtain new authorization encapsulates both compliance and effective management of travel logistics.