Each county in this State in which there is an existing shooting range or in which a shooting range is established must prominently display a sign at a one-mile radius of each shooting range on all primary highways to notify the public that they are entering the area of a shooting range which shall bear the following inscription:
"SHOOTING RANGE—NOISE AREA"
The sign must conform to the Manual of Uniform Traffic Control Devices and the policies of the Department of Transportation. The cost of fabricating the sign must be paid by the shooting range. Any shooting range in existence prior to January 1, 2000, must have a sign installed by January 1, 2001.