DMV does not provide official inspection station signs . You may purchase these signs from various sign shops and automotive supply stores . Your sign requirements will differ based on the types of vehicles you will be inspecting
How do you become an authorized inspection station?
o become a licensed Inspection Station by the Department of Motor Vehicles DMV in New York Statesconsult the DMV Commissioner s Motor Vehicle Inspection Regulations pdf CR-79download and read Facility Requirements Inspection Stations pdf  VS-143
What else do I need to know?