Okla. Admin. Code § 545:20-1-1.1
The following words and terms, when used in this Subchapter, shall have the following meaning, unless the context clearly indicates otherwise:
"Renewal period" means the two year period from July 1 of an even-numbered year to the following June 30 of the next even-numbered year.
Added at 31 Ok Reg 610, eff 1-29-14 (emergency)
Added at 31 Ok Reg 2158, eff 9-12-14