Gaseous hydrogen systems shall be designed, constructed, installed, operated and maintained as specified in NFPA 52, except as otherwise provided in this chapter.
Wis. Admin. Code Department of Safety and Professional Services SPS 340.81
Section SPS 340.42 contains requirements for vehicle-fuel dispensing systems.
See chapter SPS 341 for registration and inspections of gaseous hydrogen pressure vessels that are not within the scope of this chapter.