; and (ii) develops the technical consensus for adopting mitigation measures for such participation; and (D) (i) assign a project manager to oversee the demonstration project and carry out project activities under this subsection; and (ii) in assigning such project manager, leverage National Aeronautics and Space Administration Centers and the personnel of National Aeronautics and Space Administration Centers, as practicable. (4) Research and development phase With respect to orbital debris identified under paragraph (1) of subsection (a), the Administrator shall, to the extent practicable and subject to the availability of appropriations, carry out the additional research and development activities necessary to mature technologies, in partnership with eligible entities, with the intent to close commercial capability gaps and enable potential future remediation missions for such orbital debris, with a preference for technologies that are capable of remediating orbital debris that have a broad range of characteristics described in paragraph (2)(B)(i) of that subsection. (5) Demonstration mission phase (A) In general The Administrator shall evaluate proposals for a demonstration mission, and select and enter into a partnership with an eligible entity, subject to the availability of appropriations, with the intent to demonstrate technologies determined by the Administrator to meet a level of technology readiness sufficient to carry out on-orbit remediation of select orbital debris. (B) Evaluation In evaluating proposals for the demonstration project, the Administrator shall— (i) consider the safety, feasibility, cost, benefit, and maturity of the proposed technology; (ii) consider the potential for the proposed demonstration to successfully remediate orbital debris and to advance the commercial state of the art with respect to active debris remediation; (iii) carry out a risk analysis of the proposed technology that takes into consideration the potential casualty risk to humans in space or on the Earth’s surface