|CHAPTER�4�-�TEMPORARY�DUTY�TRAVEL�TDY
    PART�D:��ALLOWABLE�TRAVEL�TIME�FOR�TDY�TRAVEL
        U4310�TRAVEL�BY�GOVERNMENT�CONVEYANCE�DIRECTED
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| | U4310 TRAVEL BY GOVERNMENT CONVEYANCE DIRECTED� | 
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| | When travel is directed and performed by Government conveyance (except auto) in connection with TDY, per diem or AEA is payable for the time needed to perform the travel directed.� When travel is performed by Government automobile, per diem or AEA is payable for the time needed to perform the directed travel or for the travel time computed under par. U5160-B, whichever results in the lesser amount.� When travel by available Government conveyance is directed,� but travel is performed by some other mode of transportation, per diem or AEA is allowed for the travel time required via the mode of transportation used, not to exceed the amount which would have been payable for travel via the mode of Government transportation directed. | 
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| | U4315 GOVERNMENT TRANSPORTATION REQUEST USED� | 
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| | When a member uses a GTR, the allowable travel time is the actual time used, if the routing is over the usually traveled direct route and the factors for scheduling travel in par.U4325 are used to determine the itinerary. | 
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| | ------------------------------------------------ | 
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| | U4320 COMMERCIAL TRANSPORTATION USED NOT BY GTR� | 
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| |                                                                                                                                                                                                        | 
| | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | 
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| | When a member uses commercial transportation and par. U4310 orU4315don't apply, the allowable travel time is the lesser of the member's actual travel time or a schedule in accordance with par.U4325. | 
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| |                          | 
| | ------------------------ | 
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| | U4325 SCHEDULING TRAVEL� | 
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| |               | 
| | ------------- | 
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| | A.� Schedule. | 
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| |                                                                                                                                                                                                                                                                                  | 
| | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | 
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| | In determining a schedule, travel is by the scheduled transportation which most nearly coincides with the time of departure and arrival needed to carry out the mission and considering the provisions of this subparagraph.� In selecting a schedule consideration is given to: | 
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| |                                                                                                                                                                                                                                                                                                                                                                          | 
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| | 1. duty hours;
2. duty requirements;
3. availability of lodging at points of origin, destination or intermediate stops;
4. the need for onward transportation;
5. the member's comfort and well being; and
6. the member not being scheduled for departures and arrivals between 2400 and 0600 unless that is the only schedule available or is required by the mission. | 
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| |                      | 
| | -------------------- | 
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| | B.� Early Departure. | 
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| |                                                                                                                                                                                                                                                                      | 
| | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | 
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| | When a member departs early to overcome a short interval between the scheduled time of arrival and the required reporting time at a duty station, the voucher� includes a brief statement as to the reason for departing earlier than as scheduled under par. U4300. | 
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| |                              | 
| | ---------------------------- | 
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| | C.� Scheduled Early Arrival. | 
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| |                                                                                                                                                                                                                                                   | 
| | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | 
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| | When a member travels over a direct route by air to a TDY station, the departure may be scheduled to allow arrival at the TDY station 24 hours before the beginning of a work status without interruption of entitlement to per diem or AEA when: | 
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| | 1. the PDS and TDY stations are separated by four or more time zones; | 
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| | ------------------------------------------------- | 
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| | 2. at least one of the duty points is OCONUS; and | 
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| | ---------------------------------------------------------------------------------------------------------- | 
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| | 3. the itinerary does not involve any scheduled stopovers or planned delays in excess of 8 hours en route. | 
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| | ----------------------------------------------------------------------------------------------------------------------------------------------------- | 
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| | The time zones in which the point of origin and destination are located shall not be included in the four time zones separating the points of travel. | 
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| | --------------------------------------- | 
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| | D.� Travel During Normal Hours of Rest. | 
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| |                                                                                                                                                                                                                                                | 
| | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | 
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| | If subpar. A cannot be followed, and there�s a need for performance of duty immediately upon arrival, the order-issuing official may authorize/approve rest stops en route, or a rest period at the TDY location before reporting for duty if: | 
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| | 1.the traveler is not authorized premium class accommodations; and: | 
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| | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | 
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| | 2.it is necessary to schedule travel to begin at, near, or after the conclusion of the regularly scheduled hours of duty and the conditions and circumstances in the case so warrant; or� | 
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| | 3.the traveler is required to travel during normal sleeping hours; or� | 
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| | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | 
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| | 4.the scheduled flight time including stopovers exceeds 14 hours.� Scheduled flight time is the time between the scheduled airline departure from the PDS/TDY point until the scheduled airline arrival at the TDY point/PDS. | 
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| |                 | 
| | --------------- | 
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| | E.� Rest Stops. | 
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| |                                | 
| | ------------------------------ | 
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| | 1.� shall not exceed 24 hours, | 
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| | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | 
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| | 2.� shouldn�t exceed a reasonable period of rest plus delay needed to secure the earliest transportation to the authorized destination (transportation schedules or other conditions permitting), and | 
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| | 3.� should be scheduled, to the maximum extent practicable, where free stopovers are permitted en route. | 
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| | -------------------------------- | 
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| | F.� Use of Reduced Travel Fares. | 
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| | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | 
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| | When, to qualify for reduced travel fares, a member elects to stay at a TDY station longer than required by the assignment and the action is authorized/approved by the member's commanding officer, per diem or AEA for the additional time may be paid if: | 
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| | 1.the additional cost of per diem or AEA is offset by the savings on the transportation, yeilding an overall savings to the Government: and | 
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| | 2.the delay doesn�t extend the time on� TDY beyond the time when the member is required to be at work at the PDS (B-192364,� February 15, 1979; B-169024,� May 5,� 1970). | 
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| | -------------------- | 
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| | U4330 TRAVEL BY POC� | 
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| |                                                                                            | 
| | ------------------------------------------------------------------------------------------ | 
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| | Transportation cost and travel time are computed in accordance with pars. U3305 and U3310. | 
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| | ----------------------------------- | 
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| | U4335 TRAVEL BY SPECIAL CONVEYANCE� | 
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| | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | 
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| | When the use of a special conveyance is authorized/approved, allowable travel time is the actual time needed to perform the travel, except travel by a vehicle is computed under par. U5160-B. | 
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| |                              | 
| | ---------------------------- | 
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| | U4340 TRAVEL BY MIXED MODES� | 
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| |                                                                                                                                                                                                           | 
| | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | 
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| | When travel is performed between any two points of a separate leg of a journey (par. U3405-B) partly by POC and partly by common carrier, the per diem or AEA is computed as in pars. U3305-C or U3310-C. | 
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| | PART E:� GOVERNMENT MESS USE/AVAILABILITY | 
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| |                        | 
| | ---------------------- | 
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| | U4400� GOVERNMENT MESS | 
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| |                      | 
| | -------------------- | 
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| | A.� Mess Available.� | 
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| | -------------------------------------------------------------------------------------------- | 
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| | Government mess must be used to the maximum extent practicable by members quartered on-base. | 
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| |                          | 
| | ------------------------ | 
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| | B.� Mess Not Available.� | 
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| |                                     | 
| | ----------------------------------- | 
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| | A Government mess is not available: | 
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| | ------------------------------------------------------------------------------------------------------------------------ | 
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| | 1.� when Government lodgings on the installation aren't available to a member while on official travel (see par. U1045); | 
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| |                           | 
| | ------------------------- | 
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| | 2.� on travel days; or��� | 
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| |                                                | 
| | ---------------------------------------------- | 
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| | 3.� when an order-issuing official determines: | 
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| | ---------------------------------------------------------------- | 
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| | a.� the use of the mess adversely affects mission performance;�� | 
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| | b.� there's excessive distance between the mess and place of duty, and/or the mess and place of lodging;� | 
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| | ----------------------------------------------------------------------------------------------------------------------------- | 
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| | c.� transportation is not reasonably available between the mess and place of duty, and/or the mess and place of lodging; or�� | 
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| |                                                            | 
| | ---------------------------------------------------------- | 
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| | d.� duty hours and mess operating hours aren't compatible. | 
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| |                                          | 
| | ---------------------------------------- | 
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| | C.� Travel Order/Voucher Documentation.� | 
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| |                                                                                                                                                                                                           | 
| | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | 
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| | Travel orders must direct the GMR or PMR if one of these rates is to apply.� If one of these rates is directed, but during the trip the Government mess is not available, the member shall be reimbursed: | 
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| | ------------------------------------------------------------------------- | 
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| | 1.� the locality M&IE meal rate if all three meals were not available; or | 
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| |                                                    | 
| | -------------------------------------------------- | 
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| | 2.� the PMR if one or two meals are not available, | 
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| | ------------------------------------------------------------------------------------------- | 
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| | as long as the authorizing official accepts the member's certification of non-availability. | 
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| |                                                                                                                                                                                                                | 
| | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | 
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| | NOTE:� When orders, with the exception of those to schoolhouse� training (see par. U4125-A3b(3), do not direct the GMR or PMR, the locality M&IE rate shall be paid (see par. U4125-A3g for deductible meals). | 
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| | PART F:� MISCELLANEOUS REIMBURSABLE EXPENSES | 
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| |                | 
| | -------------- | 
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| | U4500 GENERAL� | 
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| |          | 
| | -------- | 
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| | A.Scope. | 
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