Pub. Resources Code, § 42395

(a) For purposes of this chapter, “reusable” or “refillable” or “reuse” or “refill,” in regard to propane cylinders means a cylinder that satisfies all of the following:

(1) Explicitly designed and marketed to be utilized multiple times for the same product.

(2) Designed for durability to function properly in its original condition for multiple uses.

(3) Supported by adequate infrastructure to ensure the cylinders can be conveniently and safely reused or refilled for multiple cycles.

(b) For purposes of this chapter, “propane cylinder” does not include any of the following:

(1) Cylinders that are customarily designed for use in the construction industry and, when full, contain less than 15 ounces of fuel, whether filled solely with propane or not.

(2) Cylinders that have an overall product height-to-width ratio of 3.55 to 1 or greater.

(3) Cylinders that are offered to a state or local government agency for purchase pursuant to the United States General Services Administration’s State and Local Disaster Purchasing Program, or a successor program.