A. Except for scheduled member injuries enumerated in 85 O.S., Section 333(E) and as otherwise provided in Rule 22 and Rule 23, a physician's evaluation of permanent impairment for injuries occurring on or after August 26, 2011 shall be based solely on criteria established by the Fifth Edition of the American Medical Association's Guides to the Evaluation of Permanent Impairment, except for the Diagnosis-Related Estimates (DRE) Method, including the DRE tables set forth in Chapter 15, “The Spine.” The examining physician shall not deviate from the Guides or any alternative thereto except as specifically provided for in the Guides or modifications to the Guides adopted as provided in 85 O.S., Section 333(C).

B. Evaluations of permanent impairment which are prepared in support of a Motion for Change of Condition shall be performed using the appropriate edition of the AMA Guides, including any approved alternative method that deviates from or is used in place of or in combination with the Guides, in effect on the date of injury.