of the Air Force’s recommendations regarding the use of concurrent and proportional fielding and how the Air Force applied these principles in the fielding plan for the HH–60G replacement programs. (2) An evaluation of the Air Force’s fielding plan for the HH–60G replacement programs, including an assessment of the Air Force’s rationale for the plan, as well as the alternative fielding plans considered by the Air Force. (3) An evaluation of the potential readiness impact of the Air Force’s fielding plan on active duty, National Guard, and Reserve units, including the ability to meet training, maintenance, and deployment requirements, as well as the implications for total force integration initiatives should the fielding not be proportional. (d) HH–60G replacement programs defined In this section, the term HH–60G replacement programs means the HH–60G Ops Loss Replacement and HH-60W Combat Rescue Helicopter programs. E Defense-wide, Joint, and multiservice matters 141. F–35 economic order quantity contracting authority (a) In general The Secretary of Defense may enter into one or more contracts during fiscal year 2018 for the procurement of economic order quantities of material and equipment that has completed formal hardware qualification testing for the F–35 aircraft for use in procurement contracts to be awarded during fiscal years 2019 and 2020. The total amount obligated under all contracts entered into under this section shall not exceed $661,000,000. (b) Authority To the extent that funds are otherwise available for obligation, the Secretary may enter into economic order quantity contracts for purchases under this section whenever the Secretary finds each of the following: (1) That the use of such a contract will result in significant savings of the total anticipated costs of carrying out the program through annual contracts. (2) That the minimum need for the property to be purchased is expected to remain substantially unchanged during the contemplated contract period in terms of production rate,