In February 2009, the County of Riverside Board of Supervisors adopted Policy Number H-29, creating the Sustainable Building Policy. The Policy requires that all new county building projects initiated on or after March 1, 2009 must meet the criteria for LEED certification. The Board of Supervisors may grant exceptions, especially for projects under 5,000 square feet. Additionally, all county building projects must have a LEED accredited professional on the development team. The policy also encourages existing structures to seek the LEED Existing Buildings certification, and encourages private construction projects to incorporate LEED building practices.