1、 Department of Defense INSTRUCTION NUMBER 5154.31,Volume 5 October 16,2015 USD(P&R)SUBJECT:Commercial Travel Management:The Per Diem,Travel and Transportation Allowance Committee(PDTATAC)References:See Enclosure 1 1.PURPOSE a.Instruction.This instruction is composed of several volumes,each containin
2、g its own purpose.The purpose of the overall instruction,in accordance with the authority in DoD Directive 5124.02(Reference(a),is to establish and implement policy,assign responsibilities,and provide procedures regarding the commercial travel program within the DoD.b.Volume.This volume:(1)Reissues
3、DoD Directive 5154.29(Reference(b)as a DoD instruction to establish policy and assign responsibilities for developing,administering,and maintaining uniform travel and transportation,station,and housing allowance regulations through the PDTATAC.(2)In accordance with the authority in Reference(a):(a)A
4、uthorizes the maintenance and publication of the Joint Travel Regulations(Reference(c).(b)Incorporates and cancels Deputy Under Secretary of Defense for Military Personnel Policy Memorandum(Reference(d).2.APPLICABILITY.This volume applies:a.To OSD,the Military Departments,the Office of the Chairman
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