42 CFR 1006.3 - Service and fees.
(2) Delivering a copy to the entity named in the subpoena at its last principal place of business; or
(3) Registered or certified mail addressed to such individual or entity at its last known dwelling place or principal place of business.
(b) A verified return by the individual serving the subpoena setting forth the manner of service or, in the case of service by registered or certified mail, the signed return post office receipt, will be proof of service.
Title 42 published on 2013-10-01
no entries appear in the Federal Register after this date.