What is the primary source of information about allowances and reimbursable expenses for TDY travel?

The Joint Travel Regulations (JTR) serve as the primary source of information regarding allowances and reimbursable expenses for Temporary Duty (TDY) travel. The JTR is a comprehensive set of guidelines that outlines the policies and procedures governing travel for military and related civilian personnel. It provides detailed information on various aspects of TDY travel, including per diem rates, travel allowances, and reimbursement procedures, making it essential for personnel planning their travel.

While the Department of Defense Travel Manual and other options may contain relevant information regarding travel, the JTR is specifically designed to address the rules and allowances pertinent to government travel, ensuring that all personnel understand their entitlements and the proper methods for processing travel claims. This makes the JTR the go-to source for reliable and authoritative information in this context.