Which of the following is not a key statement found in Chapter 1? Choose an appropriate option and select Submit. The traveler must use the TMC and their GTCC to the maximum extent possible. A traveler may only claim reimbursement for an expense if the JTR specifically allows it. Travelers must travel responsibly (as would a prudent traveler using their own money). A traveler's per diem allowance consists of lodging, meals, and incidental expenses