41 CFR Appendix A to Part 301-11: Appendix A to Part 301-11—Prescribed Per Diem Rates

(a) For the CONUS per diem rates, see applicable FTR Per Diem Rate Bulletins, issued periodically and available at https://www.gsa.gov/perdiem;

(b) For non-foreign areas, see applicable Per Diem Rate Bulletins issued by the Department of Defense and published periodically in the Federal Register or at https://www.travel.dod.mil/Travel-Transportation-Rates/Per-Diem/; and

(c) For foreign area per diem rates, see per diem rate supplement to section 925, Department of State Standardized Regulations (Government Civilians-Foreign Areas) and available at https://aoprals.state.gov/web920/per_diem.asp.