Agency head refers to the head of the relevant operating division or other major component of the DHHS, or his or her delegatee.
Agency head for the purposes of this part means the following officials for the components indicated:
Employee of the Department includes current and former:
Certify means to authenticate under seal, pursuant to 42 U.S.C 3505 , official documents of the Department.
Testify and testimony includes both in-person, oral statements before a court, legislative or administrative body and statements made pursuant to depositions, interrogatories, declarations, affidavits, or other formal participation.
45 C.F.R. § 2.2