The successful Proposer will be expected to provide a system to bill, manage collections, reporting, payment to the City, questions, complaints for aircraft landing and parking fees at SLE. These services should include, but are not limited to: A. Automatically track and identify a minimum of ninety-nine percent (99%) of all aircraft arrivals, departures and touch and go operations at SLE, even when the aircraft is operating with incorrect or missing flight plans. B. Identify and distinguish transient aircraft activities from based aircraft activities to accurately capture and transcribe aircraft identity features and properly categorize and invoice transient landing activities. C. Maintain an operator database, supplemented beyond the FAA Aircraft Registry Database, which matches aircraft registration numbers to make, model, aircraft weight and aircraft operator and ownership information. The operator database should also include aircraft that utilize FAA Limiting Aircraft Data Displayed (LADD) filters.