301-11.300—When is actual expense reimbursement warranted?
When:
(a)
Lodging and/or meals are procured at a prearranged place such as a hotel where a meeting, conference or training session is held;
(b)
Costs have escalated because of special events (e.g., missile launching periods, sporting events, World's Fair, conventions, natural disasters); lodging and meal expenses within prescribed allowances cannot be obtained nearby; and costs to commute to/from the nearby location consume most or all of the savings achieved from occupying less expensive lodging;