A contract, standardised as to terms and conditions, for the long-term (ten years or longer) purchase (long leverage contract) or sale (short leverage contract) by a leverage customer of leverage commodity which provides for: (1) participation by the leverage transaction merchant as a principal in each leverage transaction; (2) initial and maintenance margin payments by the leverage customer; (3) periodic payment by the leverage customer or accrual by the leverage transaction merchant to the leverage customer of a variable carrying charge or fee on the initial value of the contract plus any margin deposits made by the leverage customer in connexion with a short leverage contract; (4) delivery of a commodity in an amount and form which can be readily purchased and sold in normal commercial or retail channels; (5) delivery of the leverage commodity after satisfaction of the balance due on the contract; and (6) determination of the contract purchase and repurchase, or sale and resale, prices by the leverage transaction merchant.