maintainability of a prosecution launched under Chapter XXII of the Act. The High Court took the view which according to us is an erroneous one that the provisions of section 279(1A) of the Act established the necessity for the completion of the penalty proceedings before the institution of the prosecution and therefore as long as the penalty proceedings were pending the criminal proceedings could not be instituted. Section 279(1A) of the Act merely states that a person shall not be proceeded against for an offence under section 276C or section 277 in relation to the assessment for an assessment year in respect of which the penalty imposed or imposable on him under clause (iii) of sub- section (1) of section 271 has been reduced or waived by an order under section 273A. Section 273A(1)(ii) provides that notwithstanding anything contained in the Act, the Commissioner may, in his discretion, whether on his own motion or otherwise, reduce or waive the penalty if the conditions mentioned therein are satisfied. The power conferred on the Commissioner under section 273A is an overriding power which he may exercise at his discretion. It is only where the Commissioner reduces or waives the penalty imposed or imposable under section 271(1)(iii) of the Act in exercise of his discretion under section 273A, section 279 (1A) comes into operation and acts as a statutory bar for proceeding with the prosecution under section 276C or section 277. It does not, however, provide that merely because there is a possibility of the Commissioner passing an order under section 273A, the prosecution shall not be instituted. The reason given by the High Court of Calcutta, therefore, does not appeal to us. 5. It may be that in an appropriate case the criminal Court may adjourn or postpone the hearing of a criminal case in exercise of its discretionary power under section 309 of the Code of Criminal Procedure if the disposal of any proceeding under the Act which has a bearing on the proceedings before it is imminent so that it may take also into consideration the order to be passed therein. Even here the discretion should be exercised judicially and in such a way as not to frustrate the object of the criminal proceedings. There is no rigid rule which makes it necessary for a criminal court to adjourn or postpone the hearing of a case before it indefinitely or for an unduly long period only because some proceeding which may have some bearing on it is pending elsewhere. But this, however, has no relevance to the