Okla. Admin. Code § 690:10-5-5
The clinical fellow license is valid for a period of one (1) calendar year from the date of the Board's approval of the application for practice under supervision. The Board may grant the clinical fellow a one (1) year extension of the license upon written request of the clinical fellow received prior to the expiration of the one (1) year period of previous licensure. A clinical fellow whose license expires prior to the Board's issuance of the speech-language pathologist license may not practice speech-language pathology unless exempt from licensure pursuant to 59 O.S. § 1604. If, during the completion of the clinical fellowship, a change of supervisor is necessary , the clinical fellow is responsible for notifying the Board of the change and must submit a new letter of agreement for Board approval prior to the change in supervision.
Okla. Admin. Code § 690:10-5-5