Security means a bill, note, or bond, each as defined in this section. It also means any other obligation issued by the Department that, by the terms of the applicable offering circular or announcement, is made subject to this part. Solely for purposes of this part, it also means:
(1) The interest and principal components of a security eligible for Separate Trading of Registered Interest and Principal of Securities (“STRIPS”), if such security has been divided into such components as authorized by the express terms of the offering circular under which the security was issued and the components are maintained separately on the books of one or more Federal Reserve Banks; and
(2) The interest coupons that have been converted to book-entry form under the Treasury's Coupons Under Book-Entry Safekeeping Program (“CUBES”), pursuant to agreement and the regulations in 31 CFR part 358.
31 CFR § 357.2
In this part, unless the context indicates otherwise: