The issue before this court is whether the commission abused its discretion in ordering that the intrastate certificate of a motor carrier be suspended for a period of three days.
This issue can be resolved by this court’s decision in *8Commercial Motor Freight v. Pub. Util. Comm., supra (16 Ohio St. 2d 195). In that case the court affirmed a decision of:the commission finding the “tacking” of certificate authorities to be unlawful, but reversed the imposition of a 30-day suspension of Commercial’s irregular route certificates. The court held the imposition of a 30-day suspension order was unreasonable.
Analyzing the present order in light of the standards established by Commercial, supra, we find the board’s choice of sanctions unreasonable. As with the motor carrier'-in Commercial, Duff has engaged in tacking. It has also engaged in practices of cross-hauling and interlining. For simplicity, “cross-hauling” can be defined as the utilization of the same certificate twice; “interlining” of traffic between two carriers as the joinder or combination of certificates separately held by two carriers to accomplish a through movement; and “tacking” as the same joinder of certificates as set forth in interlining, but where the two certificates in question are held by the same carrier. Basically, all three practices involve different manners of utilization of certificates of public convenience and necessity. In both;the Commercial case and the case at bar, the parties stipulated or conceded that the commission had not promulgated rules defining, authorizing or prohibiting cross-hauling, tacking or interlining.
Under circumstances similar to this cause, the court in Commercial concluded as follows:
“* * * [Although the court affirms the commission’s finding' of a violation, the majority of the court cannot agree that .the suspension of appellant’s irregular route authorization was reasonable as a penalty for that violation. Appellant has presented a colorable legal argument that tacking is permissible, an argument which the court agrees has-been urged with more vigor than persuasion. * * *
' “Were there a definite-commission rule, order, or decision either forbidding .tacking of different certificates by a single operator or requiring prior approval by the commission for such'practice, there would be no question that the. *9penalty was reasonable. Here, the penalty of a major suspension of this operator’s permit was imposed because the operator engaged in a questionable practice which other operators also engage in, as shown by the Duff case, and which the commission had under advisement at the time. Under these circumstances the penalty of a 30-day suspension is unreasonable.”
Having found the principles enunciated in Commercial dispositive of this appeal, this court modifies this order solely to remove the three-day suspension of Duff’s operating privileges. The order is affirmed in all other respects.
Order affirmed as modified.
O’Neill, C. J., Herbert, W. Brown, P. Brown and Sweeney, JJ., concur. Celebrezze and Locher, JJ., concur in part and dissent in part.