6 U.S. Code § 131 - Definitions
The term “agency” has the meaning given it in section 551 of title 5.
The term “covered Federal agency” means the Department of Homeland Security.
The term “critical infrastructure protection program” means any component or bureau of a covered Federal agency that has been designated by the President or any agency head to receive critical infrastructure information.
The term “voluntary”, in the case of any submittal of critical infrastructure information to a covered Federal agency, means the submittal thereof in the absence of such agency’s exercise of legal authority to compel access to or submission of such information and may be accomplished by a single entity or an Information Sharing and Analysis Organization on behalf of itself or its members.
 So in original. Probably should be “an”.
 So in original. The word “a” probably should not appear.