Texas Natural Resources Code - NAT RES § 113.003. Exceptions

(1) the production, refining, or manufacture of LPG;

(2) the storage, sale, or transportation of LPG by pipeline or railroad tank car by a pipeline company, producer, refiner, or manufacturer;

(3) equipment used by a pipeline company, producer, refiner, or manufacturer in a producing, refining, or manufacturing process or in the storage, sale, or transportation by pipeline or railroad tank car;

(4) any deliveries of LPG to another person at the place of production, refining, or manufacturing;

(5) underground storage facilities other than LP-gas containers designed for underground use;  

(6) any LP-gas container having a water capacity of one gallon or less, or to any LP-gas piping system or appliance attached or connected to such container;  or

(7) a railcar loading rack used by a pipeline company, producer, refiner, or manufacturer.