; and (4) a recommended mission option, and an estimated cost. (c) Implementation plan Not later than 180 days after the date of enactment of this Act, the Administrator shall transmit a plan for implementing the strategy in subsection (a), including a timeline and a list of key milestones, to the Committee on Science, Space, and Technology of the House of Representatives and the Committee on Commerce, Science, and Transportation of the Senate. (d) Early technology development The Administrator shall continue early technology development work in preparation for a Mars sample return mission. 333. Commercial Lunar Payload Services (a) In general The Administrator may establish a Commercial Lunar Payload Services program for the purposes of transporting and landing science instruments and payloads on the lunar surface or to cislunar space. (b) Relationship to other mission directorates Any lander demonstrations, services, instruments, or payloads, and the commercial lunar payload services required to deliver those payloads or instruments to the lunar surface or lunar vicinity, that are not carried out for the purposes established in subsection (a) or that are carried out for the Human Exploration and Operations Mission Directorate or the Space Technology Mission Directorate shall be funded from the Mission Directorate sponsoring the use of the program established in subsection (a). (c) Commercial Landers In carrying out the program under (a), the Administrator shall procure the services of commercial landers that are majority-designed, majority-developed, and majority-built in the United States. (d) Assessment The Administrator shall carry out an assessment of the Commercial Lunar Payload Services program to identify lessons learned, ongoing challenges, and approaches to addressing the challenges. The study shall be transmitted to the Committee on Science, Space, and Technology of the House of Representatives and the Committee on Commerce, Science, and Transportation of the Senate not later than 3 years after the