Contracting officers must include sustainable design requirements appropriate for the type of leasing action in the solicitations. Contracting officers can find solicitation requirements and instructions at https://www.gsa.gov/real-estate/real-estate-services/leasing/leasing-policy under the "Sustainability Policies" tab and within the applicable Leasing Desk Guide chapter to assist them in complying with GSA's sustainable requirements.
48 C.F.R. §570.117