|CHAPTER�4�-�TEMPORARY�DUTY�TRAVEL�TDY
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| | CHAPTER 4 - TEMPORARY DUTY TRAVEL TDY | 
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| | PART A:� MEMBERS TRAVELING TOGETHER | 
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| | U4000� GENERAL | 
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| | Members traveling together refers to travel away from the PDS during which the mission requires control of the group of travelers.� Ordinary travel reimbursements apply unless the members' orders direct no/limited reimbursement, in which case all transportation, food, lodging, and other items ordinarily reimbursed, should be provided to the members.� No per diem is payable when no/limited reimbursement is directed in the orders for members traveling together.� It only includes travel days between duty locations and does not involve entitlements for full days at duty locations.� Most members pay the food cost without operating expense.� Directing several members to travel together with no/limited reimbursement shall never be done simply to save travel funds. | 
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| | U4001 STRAGGLERS� | 
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| | A member, who becomes separated from the others while traveling as one of members traveling together under orders directing no/limited reimbursement, shall be provided for in the manner prescribed in Chapter 7, Part N. | 
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| | PART B:� PER DIEM ALLOWANCE� | 
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| | U4100� GENERAL� | 
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| | A per diem allowance is designed to offset the cost of lodging, meals, and incidental expenses incurred by a member while performing travel, and/or TDY away from the member's PDS.� A per diem allowance is payable for whole days, except for the day of departure from and for the day of return to the PDS, in which case a per diem is computed as prescribed in par. U4125-A.� Per diem rates for locations in CONUS are prescribed in Appendix D.� Per diem rates for OCONUS locations are prescribed in Appendix B. | 
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| | U4101� WHEN PER DIEM ALLOWANCE IS AUTHORIZED� | 
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| | Unless otherwise specifically provided for or restricted in this Volume, the per diem allowances prescribed in this Part apply for all periods of TDY, and travel in connection therewith, including but not limited to the following: | 
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| | 1. periods of necessary delay awaiting further transportation, | 
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| | 2. periods of delay at ports of embarkation and debarkation in connection with a PCS, | 
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| | 3. periods of TDY directed in a PCS order, | 
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| | 4. delays for the purpose of qualifying for reduced travel fares (see par.U4325-E). | 
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| | U4102� CIRCUMSTANCES IN WHICH PER DIEM NOT AUTHORIZED� | 
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| | A.� When Not in a Travel Status. | 
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| | A member is not entitled to per diem for any day before the day during which a travel status begins or for any day after a travel status ends (par.U2200-C). | 
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| | B.� Day of Leave or Proceed Time. | 
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| | A member is not entitled to per diem on any day classified as leave or proceed time.� NOTE:� A day used in a constructive travel computation for PCS mixed mode travel does not make that day a travel day (see par. U5160). | 
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| | C.� When PCS MALT PLUS or PCS Mileage Is Payable. | 
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| | A� member is not entitled to per diem for any day that PCS MALT PLUS is payable. | 
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| | D.� Travel or TDY Within PDS Limits. | 
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| | Except as authorized in par. U4105-H, a member is not entitled to per diem for travel or TDY or� performed within the limits of the PDS.� This does not preclude payment� of� per� diem� on� the day of departure from or day of return to the PDS in connection with TDY or� away from the PDS.� For transportation entitlement see Chapter 3. This subparagraph does not prohibit reimbursement under par. U4510 for occasional meals and quarters necessarily procured within the limits of the PDS by members escorting arms control inspection team/members while engaged in activities related to the implementation of an arms control treaty or agreement during the in-country period referred to in the treaty or agreement (DoD Authorization Act, FY93, P.L. 102-484, dated 23 October 1992.) | 
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| | Except as indicated below no per diem is payable at the old or new PDS for TDY en route in connection with PCS travel.� This applies even if the member vacated the permanent quarters at the old PDS and lodged in temporary quarters during the TDY.� Exception:� A member who detaches (signs out PCS) from the old PDS, performs TDY en route elsewhere, and returns TDY en route to the old PDS is entitled to per diem at the old PDS.� Example:� A member departs the Pentagon PCS on 15 June, performs TDY en route at Ft. Leavenworth 1 -31 July, returns TDY en route to the Pentagon 5-15 August, and then signs in PCS to Ft. Polk on 31 August.� The member is entitled to per diem at the Pentagon (old PDS) 5-15 August.� If the member had departed on 15 June but performed TDY in Arlington, VA first, no per diem is payable for the TDY in Arlington immediately after detachment. | 
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| | E.� TDY� Within the Local Area of the PDS (Outside the PDS Limits). | 
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| | A member is not entitled to per diem for TDY performed within the local area (outside the limits) of the PDS as defined in par U3500-B, unless overnight lodging is required. Occasional meals may be reimbursed under par. U4510 when the member is required to procure meals at personal expense outside the PDS limits. For transportation entitlements see Chapter 3. | 
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| | F.� Round Trips Within 12 Hours. | 
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| | A member is not entitled to per diem for TDY which is performed entirely within 12 hours.� Occasional meals may be reimbursed under par. U4510 when the member is required to procure meals at personal expense outside the PDS limits.� For transportation entitlements see Chapter 3. | 
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| | G.� Members Traveling Together with No/Limited Reimbursement. | 
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| | Members traveling together under orders directing no/limited reimbursement� (Part A) are not entitled to per diem except as noted in par. U4004.� Occasional meals or quarters necessarily procured are reimbursable under par. U4510. | 
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| | H.� Navigational and Proficiency Flights. | 
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| | A member is not entitled to per diem for navigational and proficiency flights when they are authorized at the member's request. | 
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| | I.� Assignment to Two-Crew Nuclear submarines. | 
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| | A member under PCS orders is not entitled to per diem after 2400 on the day the member assigned to a two-crew nuclear submarine (SSBN) arrives at the�� homeport of the vessel and no further travel is performed away from the homeport under those orders (57 Comp. Gen. 178 (1977)). | 
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| | J.� TDY or Training Duty Aboard Government Vessel. | 
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| | A member is not entitled to per diem for any period of TDY or training duty aboard a Government vessel when both Government mess and quarters are available.� The period during which this prohibition is in effect begins at 0001 on the day after the day of arrival aboard and ends at 2400 on the day before the day of departure therefrom.� The TDY or training duty is considered unbroken when a member transfers from one Government vessel to another at the same place and the transfer is made within a 10-hour period.� When quarters are required to be retained at the same or a prior TDY location, reimbursement for the cost of such quarters is made under par. U4510. | 
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| | K.� Aboard Vessel Constructed by Commercial Contractor. | 
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| | A member is not entitled to per diem for the period aboard a vessel constructed by a commercial contractor during acceptance trials before commissioning when both quarters and all meals are furnished without charge.� The period during which this prohibition is in effect begins at 0001 on the day after the day of arrival aboard and ends at 2400 on the day before the day of departure therefrom.� When quarters are required to be retained at the same or a prior TDY location, reimbursement for the cost of such quarters is made under par. U4510. | 
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| | L.� Field Duty. | 
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| | A member on field duty is not entitled to per diem except when the: | 
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| | 1. senior commander in charge of the exercise� (or designated representative)� for each operating location issues a statement to the member indicating that either Government quarters at no charge, and/or Government meals at no charge for enlisted members,� weren't available during stated periods of the field duty; | 
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| | 2. member is participating in the advance planning or critique phase of the operation; or | 
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| | 3. Secretary concerned authorized payment of a per diem to members who are performing field duty while in a travel status under par. U4105-D. | 
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| | The period during which this prohibition is in effect begins at 0001 on the day after the day on which field duty begins and ends at 2400 on the day before the day on which it ends.� This subparagraph doesn't prohibit reimbursement under par.� U4510� for occasional meals or quarters necessarily procured. | 
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| | M.� TDY Aboard Foreign (Nongovernment) Vessel. | 
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| | A member is not entitled to a per diem allowance for any period of TDY aboard a nongovernment foreign vessel when both quarters and all meals are furnished without charge.� The period during which this prohibition is in effect begins at 0001 on the day after the day of arrival on board and ends at 2400 on the day before the day of departure therefrom.� If a member is required to retain unoccupied quarters at the location where TDY was performed just before performing duty aboard a nongovernment foreign vessel, reimbursement for the cost of such quarters shall be made under par. U4510. | 
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| | N.� Member in Missing Status. | 
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| | A member is not entitled to per diem after 2400 of the day the member is officially carried as or determined to be absent in a missing status under the� Missing� Person� Act (44 Comp. Gen. 657 (1965)). | 
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| | U4105� PER DIEM PAYABLE UNDER SPECIFIC CASES | 
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| | A.� TDY in Connection With Fitting Out or Conversion of a Vessel. | 
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| | When a member is assigned to TDY in connection with fitting out or conversion of a vessel, per diem is authorized during each fitting out or conversion period, including the day of ship commissioning or service craft placement in service,� and day of ship decommissioning or service craft placement out of service.� Authorization for per diem ends on the date the member's assignment is changed from TDY in connection with fitting out or conversion of a vessel to permanent duty aboard that vessel, even if that change is effected prior to the date of ship commissioning or service craft placement in service.� In determining entitlement to per diem, par. U4102-M applies after a ship or service craft under construction is delivered to the Government. | 
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| | B.� Travel by U.S. or Foreign Government Vessel for 24 Hours or More | 
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| | 1.� Member Not Charged for Meals. | 
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| | A member is not entitled to a per diem allowance when traveling aboard a U.S. or foreign government vessel when meals are furnished without charge, except on days of embarkation and debarkation if otherwise entitled thereto under subpar. C. | 
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| | 2.� Member Charged for� Meals. | 
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| | Members traveling aboard a U.S. or foreign Government vessel, other than an oceangoing car ferry, of 24 hours or more as passengers (except those aboard for TDY or training) who are charged for meals shall be paid a per diem allowance equal to the cost of the meals furnished, except on the day of embarkation and debarkation. | 
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| | C.� Travel, TDY Aboard Commercial Vessel or U.S. Government Vessel Totally Leased for Commercial Operation. | 
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| | Except for the day of arrival (day of embarkation) and the day of departure (day of debarkation), a member (including Coast Guard members performing inspection aboard U.S. merchant vessels) traveling on TDY aboard a U.S. Government vessel leased to and operated by a� commercial company or a commercial vessel, other than an oceangoing car ferry, is entitled to a per diem allowance of $6 per day.� When the $6 rate is not sufficient to meet the member's subsistence expenses, a per diem rate equal to the anticipated expenses may be authorized/approved.� Such rate may not exceed $25 and the order-issuing official should state in the orders the circumstances warranting the increased rate. | 
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| | D.� Field Duty. | 
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