Yes, you must follow OMB Circular A-123, "Management's Responsibility for Accountability and Control" (http://www.whitehouse.gov/omb), when establishing management controls for your aviation program. The circular requires that you establish organizations, policies, and procedures to ensure that, among other things, your aviation program achieves its intended results and you use your resources consistently with your agency's missions.
41 C.F.R. §102-33.135