(1) If the appellate or revisional authority or an authority competent to review an order under rule 148 receives any information during the pendency of disposal of appeal, revision, or review for which such authority has reasons to believe that some amount of turnover of sales or purchases has escaped assessment of tax in respect of the period to which such appeal, revision or review relates, or some amount of input tax credit or input tax rebate has been allowed in excess of the sum that is allowable in accordance with the provisions of the Act and the rules made thereunder and if such authority likes to take into consideration such information in passing his appellate, revisional or review order, as the case may be, such authority before passing any such order shall serve upon the appellant or the applicant for revision or review a notice in Form No. 69 directing him to prefer objection or make representation, if any, on the date and time specified therein.

(2) The date for hearing in pursuance of the notice referred to in sub-rule (1) shall be fixed ordinarily not less than fifteen days from the date of issue of such notice.