As used in this part:
(1)
(a) "Carbon dioxide system" means a system that:
(i) stores, uses, or dispenses carbon dioxide; and
(ii) has a capacity of 100 pounds or more of carbon dioxide.
(b) "Carbon dioxide system" includes:
(i) an appliance used with a carbon dioxide system; and
(ii) pipes, tubing, fittings, required signage, and gas detection, that are part of, or connect to, a carbon dioxide system.
(2) "Service" means the inspection, installation, maintenance, repair, or modification of a carbon dioxide system.