contract payments A contract entered into under subsection (a) shall provide that any obligation of the United States to make a payment under the contract for a fiscal year is subject to the availability of appropriations for that purpose for such fiscal year. (f) Definitions In this section: (1) Congressional defense committees The term congressional defense committees has the meaning given the term in section 101(a)(16) of title 10, United States Code. (2) Milestone decision authority The term milestone decision authority has the meaning given the term in section 2366a(d) of title 10, United States Code.