14 C.F.R. § 372.24
(a) Before selling or offering to sell, soliciting or advertising any charter flight, a charter operator shall comply with one of the three following requirements:
(2) The charter operator shall:
(ii) Enter into an agreement with a bank, the terms of which shall include the following:
(a) Each participant shall pay for his deposit and subsequent payments comprising the charter participant's tariff fare only by check or money order payable to such bank which shall maintain a separate accounting for each flight: Provided, however, That if the participant makes a cash deposit, the charter operator who receives such cash deposit shall forthwith remit to the designated bank a check for the full amount of the deposit;
(b) The bank shall not pay the air carrier or foreign air carrier the charter price for the transportation earlier than 60 days (including day of departure) prior to the scheduled day of departure of the originating or returning flight, upon certification of the departure date and price by the charter operator;
(c) The bank shall reimburse the charter operator for refunds made by the latter to the participants upon written notification from the charter operator;
(d) If the charter operator notifies the bank that a flight has been canceled, the bank shall make the applicable refunds directly to the participants;
(e) Except as provided in paragraph (a)(2)(ii)(c) of this section, the bank shall not pay any funds from the account to the charter operator prior to 2 banking days after completion of each flight when the balance in the account shall be paid to the charter operator upon certification of the completion date by the charter operator and direct air carrier;
(f) Notwithstanding any provisions above, the amount of total cash deposits required to be maintained in the depository account of the bank may be reduced by one or both of the following: The amount of surety bond in the form prescribed herein in excess of the minimum bond required by paragraph (a)(2)(i) of this section; an escrow with the designated bank of Federal, State, or municipal bonds or other securities, consisting of certificates of deposit issued by banks having a stated policy of redeeming such certificates before maturity at the request of the holder (subject only to such interest penalties or other conditions as may be required by law), or negotiable securities which are publicly traded on a securities exchange, all such securities to be made payable to the escrow account: Provided, That such other securities shall be substituted in an amount no greater than 80 percent of the total market value of the escrow account at the time of such substitution: And provided, further, That should the market value of such other securities subsequently decrease, from time to time, then additional cash or securities qualified for investment hereunder shall promptly be added to the escrow account, in an amount equal to the amount of such decreased value; or
(3) The charter operator shall:
(ii) Enter into an agreement with a bank, the terms of which shall include the following:
(a) Whenever the gross amount of customers' deposits exceeds 25 percent of the charter operator's net worth, as computed under generally accepted accounting principles, the charter operator shall, on or before the 30th day of the succeeding month, place in escrow or in trust with the bank cash in an amount at least equal to the amount by which such deposits exceed 25 percent of its net worth: Provided, That negotiable securities may be substituted for cash, but the market value thereof shall at all times be not less than the amount of cash for which they are substituted;
(b) The escrow agreement or the trust agreement between the bank and the operator shall not be effective until approved by the Department. Claims against the escrow or trust may be made only with respect to the nonperformance of air transportation.
(d) Any bond furnished under this section shall provide that unless the charter participant files a claim with the charter operator, or, if he is unavailable, with the surety, within sixty (60) days after termination of the charter, the surety shall be released from all liability under the bond to such charter participant. The contract between the charter operator and the charter participants shall contain notice of this provision.
(Secs. 101(3), 204(a), 401, and 402 of the Federal Aviation Act of 1958, as amended, 72 Stat. 737, 743, 754, and 757, as amended, 49 U.S.C. 1301, 1324, 1371 and 1372)
[SPR-54, 37 FR 11163, June 3, 1972, as amended by SPR-60, 37 FR 19122, Sept. 19, 1972; SPR-63, 37 FR 22849, Oct. 26, 1972; SPR-95, 40 FR 52355, Nov. 10, 1975; Doc. No. 47939, 57 FR 40105, Sept. 2, 1992]