Virginia's PPTA Guidelines dictate a six-phase procurement process, including three phases that serve as oversight review: 1) VDOT Quality Control Review, 2) Independent Review Panel, 3) Commonwealth Transportation Board (CTB) Review and Recommendations. Both monitoring and oversight are necessary to maintain accountability on the part of the public and private sectors while ensuring that that the government's interests are protected. Most of the guidelines for monitoring and oversight are explicitly stated in the project's Comprehensive Agreement, which establishes construction milestones allowing VDOT to maintain oversight of the project, provide notices to proceed, and the right to terminate the contract if certain criteria are not satisfied.