Which of the following statements is true regarding expense reimbursement?

The selection stating that the JTR must mention an item for the Authorizing Official (AO) to approve reimbursement is correct because the Joint Travel Regulations (JTR) provide a structured guideline that specifies what can be reimbursed. For an expense to qualify for reimbursement, it generally needs to be explicitly categorized within the regulations. This ensures that reimbursements adhere to the governing policies, promoting accountability and proper financial management.

In this context, the guidelines are designed to safeguard against the approval of unwarranted expenses, thus maintaining the integrity of the reimbursement process. Items that are not mentioned in the JTR may not receive reimbursement because they do not meet the established criteria.

In contrast, the other options suggest broader allowances or discretion that are not consistent with JTR regulations. For example, not all expenses are reimbursable, and there are always specific criteria outlined for various item types. Additionally, while it might seem convenient not to require receipts for smaller amounts, such a policy is not universally applied across all situations. Finally, stating that the AO has full discretion contradicts the structured nature of the regulations, where limits and guidelines are intended to be followed.