((a)) ** .—** In carrying out authorities provided to the Secretary to design, construct, accept, or otherwise acquire assets and systems under section 501(d), the Secretary, acting through the Commandant or the head of an integrated program office established for a major acquisition program, may enter into contracts for a major acquisition program and 3 Polar Security Cutters in addition to those approved as part of a major acquisition program on .

((b)) ** .—** Contracts entered into under subsection (a)—

((1)) may be block buy contracts;

((2)) may be incrementally funded;

((3)) may include combined purchases, also known as economic order quantity purchases, of—

((A)) materials and components; and

((B)) long lead time materials; and

((4)) as provided in , may be multiyear contracts.

((c)) ** .—** Any contract entered into under subsection (a) shall provide that any obligation of the United States to make a payment under the contract is subject to the availability of amounts specifically provided in advance for that purpose in subsequent appropriations Acts.