Okla. Stat. tit. 52, § 52-91: Meters on pipelines - Commission to designate type -

Inspection - Cost of operation.

The Commission is hereby empowered and authorized by its orders,

rules, and regulations, to require that meters be installed (a) upon

any pipeline used in purchasing and/or transporting oil in or out of

any prorated common source of supply and/or from storage adjacent

thereto and (b) upon any pipeline used in gathering and/or

transporting oil from leases or storage in such common source of

supply, to refineries, loading racks, and field or other storage,

and/or to deliver such oil to other transportation lines in or near

such fields. All meters installed pursuant to any order, rule or

regulation of the Commission made or issued by it under the

provisions of this section shall be of a type or types approved by

it and the Proration Umpire shall be in mechanical construction and

accuracy in operation, sufficient to register the oil transported

through the pipeline or pipelines upon which such meters are

installed with a degree of accuracy of not more than two percent

(2%) from accurate. Said meters shall be installed and maintained

at the cost and expense of the owner and/or operators of the

pipelines on which the same are required to be installed. No owner

or operator of any such pipeline upon which a meter or meters shall

have been installed and/or is being maintained pursuant to orders,

rules and regulations of the Commission made hereunder, shall

operate such pipeline or pipelines at any time when the meter or

meters thereon are not properly registering the flow of oil to the

knowledge of such owner or operator or when by the exercise of

reasonable diligence he or it should have known thereof, except or

unless permission to do so by order of the Commission shall have

been granted. Said meters shall at all times be subject to

inspection and reading by the Proration Umpire, his deputies, or any

person authorized and ordered by the Commission to inspect or read

the same. The provisions of this section shall be applied and

enforced by the Commission only when it finds and holds that the

installation of such meter or meters is necessary to the enforcement

of this act, and the installation of meters shall not be required

generally, and for other purposes as a means of measuring oil.