in procurement contracts to be awarded for such program during fiscal years 2021 through 2023. (b) Limitation The total amount obligated under all contracts entered into under subsection (a) shall not exceed $574,000,000. (c) Preliminary findings Before entering into a contract under subsection (a), the Secretary shall make each of the following findings with respect to such contract: (1) The use of such a contract will result in significant savings of the total anticipated costs of carrying out the program through annual contract. (2) The minimum need for the property to be procured is expected to remain substantially unchanged during the contemplated contract period in terms of production rate, procurement rate, and total quantities. (3) There is a reasonable expectation that, throughout the contemplated contract period, the Secretary will request funding for the contract at the level required to avoid contract cancellation. (4) There is a stable design for the property to be procured and the technical risks associated with such property are not excessive. (5) The estimates of both the cost of the contract and the anticipated cost avoidance through the use of an economic order quantity contract are realistic. (6) Entering into the contract will promote the national security interests of the United States. (d) Certification requirement Except as provided in subsection (e), the Secretary of Defense may not enter into a contract under subsection (a) until a period of 30 days has elapsed following the date on which the Secretary certifies to the congressional defense committees, in writing, that each of the following conditions is satisfied: (1) A sufficient number of end items of the system being acquired under such contract have been delivered at or within the most recently available estimates of the program acquisition unit cost or procurement unit cost for such system to determine that the estimates of the unit costs are realistic. (2) During the fiscal year in which such contract is to be awarded, sufficient