of this subtitle. Such transition may include periods for testing, early adoption, and final mandatory adoption for all recorded mortgages. (b) Electronic Submissions The Repository shall accept electronic submissions and paper-based documents submitted electronically subject to rules of the Repository. After the expiration of the 10-year period that begins upon the date of the enactment of this Act, subject to an extension of such period for up to 5 additional years if the Director determines appropriate, the Repository shall require only electronic submission. D Covered Bonds 341. Definitions For purposes of this subtitle, the following definitions shall apply: (1) Ancillary asset The term ancillary asset means— (A) any interest rate or currency swap associated with 1 or more eligible assets, substitute assets, or other assets in a cover pool