51 U.S.C. § 70502

1. (1)construct an architecture and implementation plan for the Administration’s human exploration program that is not critically dependent on the achievement of milestones by fixed dates;
2. (2)implement an exploration research and technology development program to enable human and robotic operations consistent with section 20302(b) of this title;
3. (3)conduct an in-situ resource utilization technology program to develop the capability to use space resources to increase independence from Earth, and sustain exploration beyond low-Earth orbit; and
4. (4)pursue aggressively automated rendezvous and docking capabilities that can support the International Space Station and other mission requirements.