41 CFR § 304-3.9 - Subsistence allowance limitations.

(a) Acceptance of payment for, and when applicable, reimbursement by an agency to an employee and the accompanying spouse of such employee are not subject to the maximum per diem or actual subsistence expense rates when traveling in CONUS or in non-foreign areas under the following conditions:

(1) The non-Federal source pays the full amount of the subsistence expense, as authorized by the agency;

(2) The subsistence expense paid by the non-Federal source is comparable in value to that offered to or purchased by other meeting attendees; and

(3) The agency has approved acceptance of payment from the non-Federal source prior to employee's travel; if the agency has not approved any acceptance from the non-Federal source, employees may not exceed the maximum allowances. See § 304-3.11.

(b) The maximum subsistence allowances established by the Secretary of State for travel to foreign areas may not be exceeded.