Which of the following is a source of DoD travel regulations?

The Joint Travel Regulations (JTR) serve as the primary source of travel policies for the Department of Defense (DoD). These regulations provide comprehensive directives and guidelines related to travel for military personnel and are designed to ensure consistency across all branches of the military. They outline the processes for travel allowances, reimbursements, and the overall management of travel-related expenses.

The JTR is specifically tailored to address the unique needs and circumstances faced by members of the armed forces, including the complexities of military orders and deployments. By relying on the JTR, the DoD can maintain standardization in travel practices, ensuring that service members receive equitable treatment regardless of their location or service branch.

In contrast, the other options mentioned do not specifically serve as the governing source for travel regulations within the DoD. While Federal Aviation Regulations pertain to air travel safety and operational guidelines, they do not address military travel policies. Military Travel Guidelines and Defense Travel Orders may be relevant in certain contexts but do not provide the comprehensive framework that the Joint Travel Regulations establish for military travel management.