What recourse does an airport operator have if TSA denies the application?

As stipulated by the FAA Reauthorization Act of 2018, if an application is denied, TSA must inform the airport operator in writing, within sixty (60) days, and explain the findings that served as the basis for the denial. TSA must also provide the results of any cost or security analysis conducted in considering the application, and recommendations on how the airport operator can address the reasons for the denial.  The airport can reapply to participate in SPP at any time.