In this chapter:

(1) The terms “commercial product”, “commercial service”, “nondevelopmental item”, “component”, and “commercial component” have the meanings provided in sections 103, 103a, 110, 105, and 102, respectively, of title 41.

(2) The term “head of an agency” means the Secretary of Defense, the Secretary of Homeland Security, and the Administrator of the National Aeronautics and Space Administration.

(3) The term “agency” means the Department of Defense, the Coast Guard, and the National Aeronautics and Space Administration.