What must be mentioned in the JTR for an item to be approved for reimbursement by an AO?

The requirement for an item to be mentioned explicitly in the Joint Travel Regulations (JTR) is critical for its approval for reimbursement by an Approving Official (AO). This specificity ensures that the item in question is clearly recognizable and categorized appropriately, allowing the AO to determine if it meets the guidelines laid out in the JTR. By having explicit mention, it eliminates ambiguity and allows for consistent interpretation of what is covered under reimbursement policies.

Items falling under travel expenses, being categorized as essential, or aligning with pre-approved expenses can be important factors for reimbursement but do not replace the necessity for clear mention in the JTR. Explicitly stating the item ensures that it is documented and validated, providing a necessary foundation for the reimbursement process.