12 C.F.R. § 168.3
(a) Contents of security program. The security program shall:
(2) Establish procedures that will assist in identifying persons committing crimes against the association and that will preserve evidence that may aid in their identification and prosecution. Such procedures may include, but are not limited to:
(b) Security devices. Each savings association shall have, at a minimum, the following security devices:
(5) Such other devices as the security officer determines to be appropriate, taking into consideration: