Okla. Stat. tit. 17, § 17-263: Periodic detailed rate investigations

A. In order to assure that the rates charged to their customers

by public utilities and electric distribution cooperatives which

utilize fuel adjustment clauses or purchased power adjustment

clauses are just and reasonable, the Commission shall periodically

conduct detailed rate investigations of such utilities and

cooperatives.

The provisions of this subsection shall not prohibit or

otherwise restrict the authority of the Corporation Commission to

conduct, whenever necessary, an investigation or review of any such

utility or electric distribution cooperative. In addition, this

section shall not limit or restrict such utility from requesting and

receiving a rate review upon proper application to the Commission.

B. Such investigations shall include public hearings. In such

rate investigations or proceedings, income, expenses and investments

of affiliated persons, subsidiaries, firms or corporations and

emergency and off-system sales of electricity or gas shall be given

appropriate consideration by the Commission in determining the

financial requirements of the utility or cooperative.

C. However, nothing in this section shall be interpreted to

require any public utility or electric cooperative to submit itself

to the authority of the Commission for ratemaking purposes if it is

not so required by other statutory or constitutional provisions.