; or (2) if such guidance is determined to be inappropriate, initiate an update to such guidance. (b) Definitions In this section: (1) The term Milestone B approval has the meaning given such term in section 4172(e)(7) of this title. (2) The term major defense acquisition program has the meaning given such term in section 4201 of this title. (3) The term space major defense acquisition program means a major defense acquisition program for the acquisition of a satellite, ground system, or command and control system. . 1603. Enhanced authority to increase space launch capacity through space launch support services Chapter 135 of title 10, United States Code, is amended by inserting after section 2276 the following new section: 2276a. Special authority for provision of space launch support services to increase space launch capacity (a) In general The Secretary of a military department may support Federal and commercial space launch capacity on any domestic real property under the control of the Secretary through the provision of space launch support services. (b) Provision of launch equipment and services to commercial entities (1) Contract or other transaction authority The Secretary of a military department may enter into a contract or other transaction with one or more commercial entities that intend to conduct space launch activities on a military installation under the jurisdiction of the Secretary. Under such a contract or agreement, the Secretary may agree to provide to the commercial entity supplies, services, equipment, and construction needed for commercial space launch. (2) Costs (A) Direct costs If the Secretary of a military department enters into a contract or other transaction with a commercial entity under paragraph (1), such contract or transaction shall include a provision that requires the commercial entity to reimburse the Department of Defense for all direct costs to the United States that are associated with any good, service, or equipment provided to the commercial entity under the contract or