Okla. Stat. tit. 52, § 52-420.9: Specifications for commercial propane, butane and

mixtures - Identification of vehicles - Motor carriers -

Transportation out of state - Retail deliveries.

A. All liquefied petroleum gases designated as commercial

propane, commercial butane or mixtures thereof, sold for consumption

in this state, shall, when subjected to the test methods of the GPA

Midstream Association, meet applicable specifications adopted as

tentative standards by the Association for the particular product

sold.

B. All vehicles used in hauling or transporting liquefied

petroleum gases upon the highways of this state shall be identified

in such manner as the Administrator may, by rule, prescribe.

C. The Department of Public Safety of the State of Oklahoma

shall cooperate with the Administrator in the enforcement of the

provisions of this section, and the rules promulgated thereunder.

D. Transport trucks transporting liquefied petroleum gases

intrastate which are owned or operated by a person subject to and

licensed by the Oklahoma Liquefied Petroleum Gas Regulation Act

shall not be required to obtain or possess an intrastate motor

carrier or private carrier license issued by the Oklahoma

Corporation Commission.

E. Containers shall be filled or used only upon authorization

of the fee simple owner. The name of the fee simple owner, if other

than the consumer, shall be conspicuously shown on the container.

F. At least one attendant shall remain close to the transfer

connection from the time the connections are first made until they

are finally disconnected, during the transfer of the product.

During the actual transfer of liquids into containers at domestic

type dwellings and installations, the attendant shall not enter into

any type of enclosure including but not limited to truck cabs,

dwellings and barns and shall maintain visual contact with the

liquid level gauge at all times.