; (2) by amending subsection (b) to read as follows: (b) Future exploration of Mars The Administrator shall manage human space flight programs, including the Space Launch System and Orion, to enable humans to explore Mars and other destinations by defining a series of sustainable steps and conducting mission planning, research, and technology development on a timetable that is technically and fiscally possible, consistent with section 70504. ; and (3) by adding at the end the following: (c) Definitions In this section: (1) Orion The term Orion means the multipurpose crew vehicle described under section 303 of the National Aeronautics and Space Administration Authorization Act of 2010 ( 42 U.S.C. 18323 ). (2) Space Launch System The term Space Launch System means has the meaning given the term in section 3 of the National Aeronautics and Space Administration Authorization Act of 2010 ( 42 U.S.C. 18302 ). . 414. Stepping stone approach to exploration Section 70504 of title 51, United States Code, is amended to read as follows: 70504. Stepping stone approach to exploration (a) In general The Administration— (1) may conduct missions to intermediate destinations in sustainable steps in accordance with section 20302(b) of this title, and on a timetable determined by the availability of funding, in order to achieve the objective of human exploration of Mars specified in section 202(b)(5) of the National Aeronautics and Space Administration Authorization Act of 2010 ( 42 U.S.C. 18312(b)(5) )