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, procurement rate, and total quantities. (3) That 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) That there is a stable design for the property to be acquired and that the technical risks associated with such property are not excessive. (5) That 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) That the use of such a contract will promote the national security of the United States. (c) Certification requirement A contract may not be entered into under this section unless the Secretary of Defense certifies in writing, not later than 30 days before entry into the contract, that each of the following conditions is satisfied: (1) The Secretary has determined that each of the requirements in paragraphs (1) through (6) of subsection (b) will be met by such contract and has provided the basis for such determination to the congressional defense committees. (2) Confirmation that the preliminary findings of the Secretary under paragraph (1) were made after the completion of a cost analysis performed by the Director of Cost Assessment and Program Evaluation for the purpose of section 2334(e)(1) of title 10, United States Code, and that the analysis supports those preliminary findings. (3) A sufficient number of end items of the system being acquired under such contract have been delivered at or within the most current estimates of the program acquisition unit cost or procurement unit cost for such system to determine that current estimates of such unit costs are realistic. (4) During the fiscal year in which such contract is