; or (C) the use of space products is inconsistent with international agreements for international collaborative efforts relating to science and technology; or (2) the Secretary of the Air Force determines that the use of space commodities from United States commercial providers is inconsistent with national security objectives. (e) Agreements with foreign entities Nothing in this section shall prevent the Administrator from planning or negotiating agreements with foreign governmental entities for the provision of space products. . (b) Conforming amendment Subchapter II of chapter 501 of title 51, United States Code, is amended by adding at the end the following: 50117. Commercial supply of space products. . 502. Commercial provision of services (a) In general Subchapter II of chapter 501 of title 51, United States Code, is further amended by adding at the end the following: 50118. Commercial provision of services (a) In general In planning and carrying out space exploration missions, the Administrator shall, to the greatest extent practicable, acquire services to be carried out in outer space by a United States commercial provider or through a public-private partnership with a United States commercial provider to support such missions. (b) Exceptions The Administrator shall not be required to acquire services under subsection (a) from a United States commercial provider or through a public-private partnership with a United States commercial provider if, on a case-by-case basis— (1) the Administrator determines that— (A) cost-effective services that meet specific mission requirements would not be reasonably available from United States commercial providers when required; (B) the use of such services from United States commercial providers poses an unacceptable mission risk; or (C) the use of such services is inconsistent with international agreements for international collaborative efforts relating to science and technology