If bottled or liquefied gas is used within a MOBILE FOOD ESTABLISHMENT, the OPERATOR shall have it securely installed.
Wis. Admin. Code Department of Agriculture, Trade and Consumer Protection 9-501.11
The department of safety and professional services has rules that govern bottled and liquefied gas. Contact the Safety and Buildings Division at the department of safety and professional services, P.O. Box 2509, Madison, WI 53701, telephone 608-266-3151 and 711 (TTY) or https://dsps.wi.gov/pages/home.aspx.