In State ex. rel Campbell v. Indus. Comm., 2013-Ohio-4052, the 10^th District court of appeals reviewed whether the Commission is required to rely on the AMA Guides to the Evaluation of Permanent Impairment in determining permanent partial disability awards.   The court of appeals held the Commission is not required to use the AMA Guides, as the manual is only to be used as a reference by examining physicians.  Read the case here.