(a) No operator of a skateboard park shall permit any person to ride a skateboard therein, unless that person is wearing a helmet, elbow pads, and kneepads.
(b) For any facility owned or operated by a governmental entity that is designed and maintained for the purpose of recreational skateboard use, and that is not supervised on a regular basis, the requirements under subsection (a) of this section are satisfied when all of the following occur:
(1) The governmental entity adopted an ordinance requiring any person riding a skateboard at the facility to wear a helmet, elbow pads, and kneepads.
(2) Signs are posted at the facility affording reasonable notice that any person riding a skateboard in the facility must wear a helmet, elbow pads, and kneepads and that any person failing to do so will be subject to citation under the ordinance under subdivision (1) of this subsection.