Ohio Revised Code Title I. State Government § 141.11

(A) A judge of a court of appeals who is directed or assigned to sit with the justices of the supreme court shall be paid all his actual and necessary expenses incurred while sitting or performing any duty incident to the sitting, including expenses incurred in going from his place of residence to the supreme court and in returning from the supreme court. Those expenses shall be paid from funds appropriated for the supreme court. The certificate of the judge of the court of appeals that services were so rendered and that the expenses were so incurred shall be approved by the chief justice of the supreme court or, in his absence, by the acting chief justice of the supreme court, and that approval is sufficient authority for the drawing of a warrant.

(B) In addition to the actual and necessary expenses provided for in division (A) of this section, each judge of a court of appeals who is directed or assigned to sit with the justices of the supreme court shall receive fifty dollars per day for each day of the sitting or of performing any duty incident to the sitting. The per diem compensation shall be paid from funds appropriated for the supreme court.

Prior to receiving per diem compensation under this division, a judge of the court of appeals shall certify, in writing, that he did sit with the justices of the supreme court, or did perform any duty incident to the sitting, on the days for which the per diem compensation is sought. The certificate then shall be approved by the chief justice of the supreme court or, in his absence, by the acting chief justice of the supreme court and that approval is sufficient authority for the drawing of a warrant.