In this subchapter:
(1) "Sign" means an outdoor structure, sign, display, light device, figure, painting, drawing, message, plaque, poster, billboard, or other thing that is designed, intended, or used to advertise or inform.
(2) "On-premise sign" means a freestanding sign identifying or advertising a business, person, or activity, and installed and maintained on the same premises as the business, person, or activity.
(3) "Off-premise sign" means a sign displaying advertising copy that pertains to a business, person, organization, activity, event, place, service, or product not principally located or primarily manufactured or sold on the premises on which the sign is located.