429.28. Where, on examining the application and the contested decision, the board ascertains that the Commission failed to rule upon certain questions although it was required to do so by law, it may, if the date of the hearing has not been fixed, suspend the case for the time it fixes so that the Commission may act.
If, at the expiry of the allotted time, the proceeding is maintained, the board shall hear it as though it were a proceeding in respect of the original decision.