of the Senate a report on the results of an independent technical and cost analysis of the options for developing or acquiring an enhanced Orion service module, as appropriate, that would enable direct low lunar orbit access and departure. (f) Environmental Control and Life Support System (ECLSS) Not later than 180 days after the date of enactment of this Act, the Administrator shall transmit to the Committee on Science, Space, and Technology of the House of Representatives and the Committee on Commerce, Science, and Transportation of the Senate the results of a plan and schedule for the completion, full testing, qualification, and validation of the integrated ECLSS system to be used on the Orion crew vehicle. The plan shall include a schedule, milestones, and shall identify any technical or supply chain challenges, as well as approaches to overcoming the challenges, in meeting the schedule and milestone dates. B International Space Station 221. Extension and post-ISS support (a) Policy Section 70907 of title 51, United States Code, is amended by striking at least 2024 and inserting at least 2028 and adding at the end unless continued operations present an increased safety risk or Congress has authorized a detailed plan submitted by the Administration for a transition from the International Space Station to an alternate platform, platforms or other means for continued research, as determined in section 226(b) and section 307 . (b) Independent Cost Estimate The Independent Program Analysis and Evaluation Office established in section 1004 shall arrange for an independent estimate of the cost of continuing International Space Station operations through 2028. The estimate shall include the cost of crew and cargo transportation and of the research to be undertaken reflecting the priorities identified in section 222. The assessment shall identify opportunities for operational efficiencies that could result in cost savings and increased research productivity. (c) Transmittal The Administrator shall transmit the