18 CFR §367.2260

1. (a)This account must include the excess of the face value of long-term debt securities over the related cash value of consideration received, related to the issue or assumption of all types and classes of debt.
2. (b)Amounts recorded in this account must be amortized over the life of the respective issues under a plan that will distribute the amount equitably over the life of the securities. The amortization must be on a monthly basis, with the related amounts charged to account 428, Amortization of debt discount and expense (§ 367.4280). (see General Instructions in § 367.16.)