((a)) ** .—** The Secretary of Transportation shall carry out this chapter.

((b)) ** .—** In carrying out this chapter, the Secretary shall—

((1)) encourage, facilitate, and promote commercial space launches and reentries by the private sector, including those involving space flight participants; and

((2)) take actions to facilitate private sector involvement in commercial space transportation activity, and to promote public-private partnerships involving the United States Government, State governments, and the private sector to build, expand, modernize, or operate a space launch and reentry infrastructure.

((c)) ** .—** In carrying out the responsibilities under subsection (b), the Secretary shall encourage, facilitate, and promote the continuous improvement of the safety of launch vehicles designed to carry humans, and the Secretary may, consistent with this chapter, promulgate regulations to carry out this subsection.

((d)) ** .—** When necessary, the head of an executive agency shall assist the Secretary in carrying out this chapter.