(a) Collecting carriers shall establish and maintain a financial management system to account for PFC's in accordance with the Department of Transportation's Uniform System of Accounts and Reports (14 CFR part 241). For carriers not subject to 14 CFR part 241, such carriers shall establish and maintain an accounts payable system to handle PFC revenue with subaccounts for each public agency to which such carrier remits PFC revenue.

(b) PFC revenue must be accounted for separately by collecting carriers, but the revenue may be commingled with the carrier's other sources of revenue. The PFC revenues that are held by an air carrier or an agent of the carrier after collection of a PFC constitute a trust fund that is held by the air carrier or agent for the beneficial interest of the public agency imposing the PFC. Such carrier or agent holds neither legal nor equitable interest in the PFC revenues except for any handling fee or retention of interest collected on unremitted proceeds as authorized in §158.53.

(c) Each collecting carrier shall be required to disclose the existence and amount of funds regarded as trust funds in financial statements.