; (ii) airports; (iii) digital systems and technologies, including spectrum management and evolving aerospace operations; (iv) safety and health; (v) aircraft, weather, or human factors; (vi) pre-implementation air traffic management, including NextGen; (vii) testing during the development of air traffic control systems to verify performance; and (viii) flight testing; (F) maintaining and upholding test methods, standards, and policies of the Administration and providing independent test and evaluation to confirm products are operationally suitable and effective for use in the national airspace system; (G) developing performance-based standards with industry and domestic or international partners for advanced aviation systems and other global aviation harmonization activities; and (H) facilitating interagency engagement through the research team process; (2) assisting the Associate Administrator for Advanced Aviation in fulfilling the responsibilities described in paragraphs (7) and (8) of section 2(c); (3) managing the campus of the William J. Hughes Technical Center for Advanced Aviation, including— (A) conducting operations and maintenance, engineering design and construction, and operational support services for campus facilities owned by the Administration and Administration personnel residing on properties that are owned by the Administration and located on the campus; (B) operating, maintaining, and enhancing the support infrastructure of the campus, including buildings, roads, utilities, and land; (C) ensuring compliance with environmental laws, policies, directives, and initiatives; (D) managing lease agreements and land permits that support the missions of all Federal, State, and local agencies on the campus