(A) has an original weighted average maturity of not less than 5 years; (B) is subordinated as to payment of principal and interest to all other indebtedness of the bank, including deposits; (C) is not supported by any form of credit enhancement, including a guarantee or standby letter of credit; and (D) is not held in whole or in part by any affiliate [of the bank].See id. § 108(c)(3).