What regulations authorize the Department of Defense Government Travel Charge Card (GTCC)?

The correct information regarding the authorization of the Department of Defense Government Travel Charge Card (GTCC) is outlined in DoDI 5154.31, Volume 4. This volume specifically deals with policies and procedures for the GTCC program, providing guidelines on the use of the card, responsibilities of cardholders, and procedures for managing and overseeing the program.

Understanding the structure of the Department of Defense Instruction (DoDI) series can help clarify why this volume is applicable. Each volume within the DoDI series typically addresses specific components of a topic. Volume 4 is explicitly designated for the GTCC, ensuring that directives related to its management and utilization are clearly stated.

The other volumes, while part of the same DoDI series, focus on different aspects of travel and charge card policies and do not cover the GTCC program in the detail or context that Volume 4 does. By having the GTCC regulations centralized in one volume, it simplifies compliance and reference for service members and personnel involved in travel management.