When may we accept payment from a non-Federal source for travel to a meeting or authorize an employee to accept payment on our behalf?

Who must approve acceptance of payment from a non-Federal source for travel expenses to a meeting?

What does our approving official need to consider before authorizing acceptance of payment from a non-Federal source for travel expenses for a meeting?

May we authorize an employee to exceed the maximum subsistence allowances (per diem or actual expense) prescribed in applicable travel regulations where we have authorized acceptance of payment from a non-Federal source for such allowances?

May we authorize an employee to travel by other than coach-class on common carriers or other than lowest first-class on ships if we accept payment in full from a non-Federal source for such transportation expenses?

May we authorize acceptance of payment from more than one non-Federal source for a single trip?

How do we review offers of payments in kind from the non-Federal sponsor or organizer of a meeting or similar function for items such as meals, transportation, and lodging when they are included in a waived or discounted registration fee?