Okla. Stat. tit. 17, § 261

Any purchased power adjustment clause approved and in effect for any electric distribution cooperative immediately prior to the effective date of this act shall remain in effect in its present form and method of operation until procedures conforming to the requirements of this act have been approved, established and placed into effect by the Commission. The Commission shall approve, establish and place into effect such procedures after notice and opportunity for a public hearing no later than November 1, 1977. Laws 1977, c. 252, § 12, emerg. eff. June 15, 1977.