Okla. Stat. tit. 17, § 17-155: Orders and rules of Commission - Scope - Right of appeal

The Commission may, from time to time, adopt or promulgate, such

orders, rules, regulations or requirements, relative to

investigations, inspections, tests, audits, and valuations of the

plants and properties relative to inspection and tests of meters as

in its judgment may be necessary and proper; provided, that under

the provisions of this act, any public utility, corporation,

association, company, individual, their trustees, lessees or

receivers, successors, or assigns, may appeal from any order or

finding or judgment of the Corporation Commission as provided by law

in cases tried and heard before said Commission of transportation

and transmission companies.