Okla. Stat. tit. 19, § 138.7a

A. In every case in which the defendant is subject to the death penalty and an attorney other than a county indigent defender is assigned to the case as provided by Section 138.7 of Title 19 of the Oklahoma Statutes, total compensation for attorneys who serve as lead counsel and co-counsel shall not exceed the limits set in Section 1355.13 of Title 22 of the Oklahoma Statutes. B. The maximum statutory fee established pursuant to this section may be exceeded only when counsel establishes that the case is an exceptional one which requires an extraordinary amount of time to litigate and that the request for extraordinary attorney fees is reasonable.