(a) If an employee's agency has already authorized acceptance of payment for some of their travel expenses for that meeting from a non-Federal source, then the employee may accept on behalf of the agency, payment for any of their additional travel expenses from the same non-Federal source as long as—

1. (1) The expenses paid or provided in kind are comparable in value to those offered to or purchased by other similarly situated meeting attendees; and
2. (2) The agency did not decline to accept payment for those particular expenses in advance of the employee's travel.

(b) If an agency did not authorize acceptance of any payment from a non-Federal source prior to travel, then—

1. (1) An employee may accept, on behalf of their agency, payment from a non-Federal source as authorized in this section—

   1. (i) Only the types of travel expenses that are authorized by the travel authorization (i.e., meals, lodging, transportation, but not recreation or other personal expenses); and
   2. (ii) Only travel expenses that are within the maximum allowances stated on the travel authorization;
2. (2) Employees must request their agency's authorization for acceptance from the non-Federal source within 7 working days after the trip ends; and

3. (3) If an agency does not authorize acceptance from the non-Federal source, the agency must either—

   1. (i) Reimburse the non-Federal source for the reasonable approximation of the market value of the benefit provided, not to exceed the maximum allowance stated on the travel authorization; or
   2. (ii) Require the employee to reimburse the non-Federal source that amount and allow the employee to claim that amount on their travel claim for the trip.