39 C.F.R. § 501.9 Security testing.
Title 39 - Postal Service
The Postal Service reserves the right to require or conduct additional examination and testing at any time, without cause, of any meter submitted to the Postal Service for approval or approved by the Postal Service for manufacture and distribution.
Title 39: Postal Service
PART 501—AUTHORIZATION TO MANUFACTURE AND DISTRIBUTE POSTAGE METERS
§ 501.9 Security testing.

