CFR › Title 14 › Part 271Part 271 — Guidelines for Subsidizing Air Carriers Providing Essential Air Transportation§ 271.1— Purpose.§ 271.2— Definitions.§ 271.3— Carrier subsidy need.§ 271.4— Carrier costs.§ 271.5— Carrier revenues.§ 271.6— Profit element.§ 271.7— Subsidy payout formula.§ 271.8— Rate period.§ 271.9— Discrimination prohibited.