Not legal advice — your city and fire marshal have the final word. But across commercial patios, inspections come back to the same handful of things: clearances from combustibles per the manufacturer's published specs, placement that keeps exits and egress paths clear, ventilation appropriate to the fuel, and fuel storage and lines handled to code by licensed pros.
The cheapest time to deal with all of it is before you buy. Send the patio layout and we'll flag the clearance and placement issues up front — free with every heating plan.