Before any pedestrian, vehicle or aircraft is allowed to enter the aircraft movement area* (areas are designated on the map below), the tower must be contacted for permission. To contact the tower, you must use a VHF radio (frequency 119.12).
*An “aircraft movement area” is any area which is reserved for tower-controlled movement patterns.
Any vehicle that [...]

There are a lot of different land uses at the Airport:

FBO (Fixed Based Operator) – operating business
Land Leases – private storage hangars
City Owned Buildings
Streets

Below is a map of the Airport signifying location of the FBO’s, Land Leases, City Owned Buildings and Streets.
Airport Land Use Map