Home › CFR › Title 14 › Part 39814 CFR Part 398 — Guidelines for Individual Determinations of Basic Essential Air Service§ 398.1— Purpose.§ 398.2— Number and designation of hubs.§ 398.3— Specific airports.§ 398.4— Equipment.§ 398.5— Frequency of flights.§ 398.6— Seat guarantees.§ 398.7— Timing of flights.§ 398.8— Number of intermediate stops.§ 398.9— Load factor standards.§ 398.10— Overflights.