41 C.F.R. § 301-11.304 What if my expenses are less than the authorized amount?
Title 41 - Public Contracts and Property Management
When authorized actual expense and your expenses are less than the locality per diem rate or the authorized amount, reimbursement is limited to the expenses incurred.
Title 41: Public Contracts and Property Management
PART 301–11—PER DIEM EXPENSES
Subpart D—Actual Expense
§ 301-11.304 What if my expenses are less than the authorized amount?