Chapter 4 of the Joint Travel Regulations (JTR), titled “Government Funded Leave,” establishes the comprehensive policies and standard transportation allowances for various official leave programs provided to Service members, civilian employees, and their dependents. The chapter mandates that travelers must use Government transportation when it is reasonably available and explicitly limits reimbursable expenses by prohibiting the payment of per diem or meal tickets during these trips. It provides detailed eligibility criteria and authorized routing rules for Emergency Leave for military personnel, primarily supporting those stationed Outside the Continental United States (OCONUS) who are facing personal emergencies. Furthermore, the regulation outlines Emergency Visitation Travel (EVT) for civilian employees and their dependents residing at foreign duty stations, authorizing critical transportation for severe medical emergencies, eldercare, the death of an immediate family member, unusual personal hardships, or the birth of a new child. Volume 4 also governs vital morale-boosting travel programs, detailing the frequency and approved destinations for Funded Environmental and Morale Leave (FEML) for personnel serving 24-month or longer tours at designated austere locations. Additionally, it outlines Rest and Recuperation (R&R) Leave allowances for personnel assigned to 12-month OCONUS tours or deployed to contingency operations such as Iraq, Afghanistan, or Pakistan. Finally, the chapter defines a Special Leave Transportation Allowance that reimburses eligible unaccompanied military and Coast Guard members stationed in Alaska for roundtrip airfare to their Home of Record or permanent legal residence.

Chapter 3, Part E of the Joint Travel Regulations (JTR), titled “Leave in Conjunction with TDY,” establishes the rules and financial limitations for combining personal leave with official Temporary Duty (TDY) travel. The regulation permits travelers to combine leave with official travel provided it incurs no additional cost to the Government, with reimbursement strictly capped at the constructed cost of the official travel had no personal leave occurred. It outlines specific allowances for complex scenarios, such as receiving TDY orders while already on leave, interrupting leave for official duties, or being recalled from leave due to operational emergencies. The chapter dictates the effect of leave on per diem, stipulating that Service members receive no per diem for days in a leave status, while detailing specific per diem computation rules for civilian employees taking leave around non-workdays. Furthermore, it provides comprehensive procedures for handling personal emergencies while on TDY, authorizing limited travel and transportation allowances for personnel who must interrupt their mission to return home or travel to an alternate emergency location. Finally, the regulation governs specialized administrative situations, including calculating daily rates for long-term lodging when leave is taken, reimbursing members whose ship relocates during an authorized absence, and covering retained TDY lodging expenses for Service members who take leave to visit evacuated dependents at a safe haven.

Chapter 3, Part D of the Joint Travel Regulations (JTR) establishes the comprehensive policies and allowances for medical-related travel for Service members, civilian employees, and their dependents. It outlines the parameters for standard travel and transportation reimbursements across a variety of medical scenarios, including emergency travel due to incapacitating illness or injury, outpatient treatment, convalescent leave, transfers between medical facilities, periodic physical examinations for those on the Temporary Disability Retired List (TDRL), and access to non-covered Assisted Reproductive Technology (ART). The chapter provides specialized guidance for personnel stationed Outside the Continental United States (OCONUS), authorizing travel to the nearest capable medical or dental facility when adequate care is unavailable locally. Furthermore, it details the specific per diem and transportation allowances for medically necessary attendants and escorts accompanying patients who are physically incapable of traveling alone. Finally, the regulation governs the compassionate travel of up to three designated family members or a non-medical attendant to visit a seriously wounded, ill, or injured Service member or civilian employee, ensuring their transportation and limited per diem are covered to support the patient's health, welfare, and recovery