Okla. Admin. Code § 165:58-3-31
All periodic reports required by this Commission must be received on or before the following due dates unless otherwise specified in this Chapter or unless otherwise agreed to by the Director of the Public Utility Division:
Added at 14 Ok Reg 21, eff 9-30-96 (emergency)
Added at 14 Ok Reg 1261, eff 5-15-97