Final answer:
The ATCFO should work with the FAA to create a DEN Notification procedure, as the FAA oversees civil aviation regulations and procedures in the U.S.
Step-by-step explanation:
The ATCFO should coordinate with the Federal Aviation Administration (FAA) to develop a DEN Notification procedure. This coordination is vital because the FAA is responsible for regulating all aspects of civil aviation in the United States, including the establishment of procedures for airports and notification systems. Effective collaboration between the Air Traffic Chief Financial Officer (ATCFO) and the FAA can ensure that the notification procedures at Denver International Airport (DEN) are compliant with regulatory standards, enhance safety, and are efficiently integrated with national airspace system operations.