41 C.F.R. § 301-70.202 – Process for requesting a per diem rate review.

If agency travelers frequent a location where the per diem rate is insufficient to meet necessary expenses, the agency senior travel official or other employee authorized in accordance with § 301-70.200(i) may submit a request, containing pertinent cost data, asking that the location be reviewed. Depending on the location in question the review request may be submitted to:

Table 1 to § 301-70.202
For CONUS locations	For non-foreign OCONUS area locations	For foreign area locations
General Services Administration, Office of Government-wide Policy, travelpolicy@gsa.gov	Department of Defense, Defense Travel Management Office, dodhra.mc-alex.dtmo.mbx .per-diem@mail.mil	Department of State, Office of Allowances, allowancesO@state.gov.