If Alicia did not select an available City Pair flight for her upcoming TDY, in addition to providing a written justification, she will also need to select and provide a Reason Code on the Pre-Audit Trip screen. This code corresponds to the specific reason why the contract (City Pair) fare was not used

. This process ensures that both a narrative justification and a standardized reason are documented for audit and compliance purposes. The Reason Code is typically selected from a drop-down menu or list within the Defense Travel System (DTS) or equivalent platform