for such later fiscal year. (d) Mandatory inclusion of pre-Priced option in certain circumstances (1) In general If the total base quantity of LGM–35A Sentinel intercontinental ballistic missiles to be procured through all contracts is less than 659, the Secretary of the Air Force shall ensure that one or more of the contracts includes a pre-priced option for the procurement of additional such missiles such that the sum of such base quantity and the number of such missiles that may be procured through the exercise of such options is equal to 659 missiles. (2) Definitions In this subsection: (A) Base quantity The term base quantity means the quantity of LGM–35A Sentinel intercontinental ballistic missiles to be procured under contracts excluding any quantity of such missiles that may be procured through the exercise of an option that may be part of such a contract. (B) Pre-priced option The term pre-priced option means a contract option for a contract that, if exercised, would allow the Secretary of the Air Force to procure a quantity of LGM–35A Sentinel intercontinental ballistic missiles at a predetermined price specified in such contract. 4. Report on National Land-Based Deterrence Fund (a) In general Not later than 90 days after the date of the enactment of this Act, the Secretary of Defense shall submit to the congressional defense committees a report on the advisability of creating a National Land-Based Deterrence Fund. (b) Elements The report required by subsection (a) shall include the following elements: (1) An assessment of the efficiencies and cost savings that could be gained if a National Land-Based Deterrence Fund, similar to the National Sea-Based Deterrence Fund established by section 2218a of title 10, United States Code, were to be established by statute. (2) Recommendations on cost elements of the Sentinel intercontinental ballistic missile weapon system program to be included in the fund, including an analysis of potential efficiencies and cost savings to be gained by including cost elements