Dear Shady,
The referee or arbitrator can order the person back to work,but that is required to be according to any work limitations set by the physician.
If the doctor and the referee do not agree, then you do not have to accept the decision and you can appeal the decision in court. (you can sue)
Internati&onal HR C&onsultant
GPHR cer BS, U.S.C. Pueblo; Immigration Law by Am. Mngmnt Association & USCIS Bus. Liaison ofc 1999