; and (ii) for measures that would reduce the accessibility of the school environment for children with disabilities. (3) Additional authorized uses After complying with paragraph (1), a recipient of a grant under this section may use the grant to pursue other projects, consistent with the goals of a healthy green retrofit, and in doing so, is encouraged to install green rooftops that reduce stormwater runoff and maximize urban island heat effect reduction benefits. Such rooftops shall meet the minimum performance standard specified within the Living Architecture Performance Tool (LAPT) rating system, and shall be implemented or completed in consultation with at least one Green Roof Professional (GRP) as accredited by the Green Roof Industry Association. (4) Solar PV systems A recipient of a grant under this section is encouraged to use the grant to purchase and install 1 or more solar photovoltaic systems to maximize returns, rather than leasing roof space to other individuals or entities. (5) Efficiency standards In carrying out a project using a grant provided under this section, an eligible entity shall carry out reasonable measures to meet the following energy efficiency standards, as applicable: (A) For a new construction project, design and operate the applicable facility— (i) to achieve— (I) a site energy use intensity equal to or less than 25 kBtu/sf/year; or (II) an Energy Star score of 90; and (ii) to offset not less than 30 percent of energy consumption with onsite renewable energy. (B) For a project to modify an existing facility, design and operate the facility— (i) to achieve— (I) a site energy use intensity equal to or less than 35 kBtu/sf/year; or (II) an Energy Star score of 70