41 C.F.R. § 301-11.9 When does per diem or actual expense entitlement start/stop?
Title 41 - Public Contracts and Property Management
Your per diem or actual expense entitlement starts on the day you depart your home, office, or other authorized point and ends on the day you return to your home, office or other authorized point.
Title 41: Public Contracts and Property Management
PART 301–11—PER DIEM EXPENSES
Subpart A—General Rules
§ 301-11.9 When does per diem or actual expense entitlement start/stop?