Summarize the following court judgment. Appeal No. 768 of 1966. Appeal by special leave from the judgment and order dated December 18	 1964 of the Gujarat High Court in Special Civil Application No. 332 of 1964. B.Sen	 section K. A Iyar	 R. N. Sachthey and section P. Nayar	 for the appellant. section T. Desai and 0. C. Mathur	 for the respondent. The Judgment of the Court was delivered by Shah	 J. The assessees M/s A. Raman & Company are dealers in "mill stores" in the course of their business they sell " mill stores" to other dealers including two concerns trading in the names of M/s A. M. Shah & Co. and M/s R. Ambalal & Co.	 which are owned by the Hindu undivided families	 managers of which are the only partners of the assessees. For the assessment years 1959 60	 1960 61 and 1961 62 the assessees were originally assessed by the Income tax Officer	 Circle 1	 Ward A	 Ahmedabad	 while the partners of the assessees and the Hindu undivided families which traded in the names of M / s A. M. Shah & Co. and M / s R. Ambalal & Co. were assessed by Income tax Officers in other Circles. The cases of assessees	 of the partners of the assessees and of the two Hindu undivided families trading in the names of A. M. Shah & Co. and R. Ambalal & Co. were later transferred to the Income tax Officer	 Group Circle J	 Ahmedabad. That Officer by letter dated March 20	 1964 informed the assessees that he was convinced from a perusal of the assessment records of the assessees	 their partners and their individual Hindu undivided families	 that the partners of the assessees had contrived to divert profits of the assessees to their respective Hindu undivided families and had tried to "evade proper taxation"	 and on that ground he called upon the assessees to submit their objections	 if any	 to the reopening of the assessments for the years 1959 60	 1960 61 and 1961 62. The assessees in reply contended that the Income tax Officer had no jurisdiction to reopen the assessments since the Hindu undivided families of the two partners and the assessees had submitted "effect and complete returns of income" supported by their books of account	 "quantity details" of purchases	 sales and expenses	 and had given all material facts and relevant information necessary for assessment at the time of each assessment. The Income tax Officer issued three separate notices under section 147 of the Income tax Act	 1961	 requiring the assessees to show cause why the assessments for the years 1959 60	 1960 61 12 and 1961 62 should not be reopened. The High Court of Gujarat in a petition for a	 writ under article 226 of the Constitution quashed those notices and restrained the Income tax Officer from taking proceedings in pursuance thereof. With special leave granted by this Court	 the Commissioner of Income tax has appealed to this Court. In support of the claim of the Income tax Officer	 to reopen the assessments	 reliance was placed in the High Court on cl. (b) of section 147 (1)	 of the Income tax Act	 1961. The material part of section 147(1)(b) may be read: "If (a) (b)notwithstanding that there has been no omission or failure as mentioned in clause (a) on the part of the assessee	 the Income tax Officer has in consequence of information in his possession reason to believe that income chargeable to tax has escaped assessment for any assessment year	 he may	 subject to the provisions of sections 148 to 153	 assess or reassess such income or recompute the loss or the depreciation allowance as the case may be	 for the assessment year concerned. Explanation 1 For the purposes of this section	 the following shall also be deemed to be cases where income chargeable to tax has escaped assessment	 namely: (a) where income chargeable to tax has been underassessed; or * * * * *" Under section 147(1)(b) reason to believe that income chargeable to tax has escaped assessment in consequence of information in the possession of the Income tax Officer is a condition precedent to the exercise of his jurisdiction to assess or reassess the income of the assessee. If that condition does not exist	 steps taken by the Income tax Officer to assess or reassess the income will be without jurisdiction. It was held by this Court in Calcutta Discount Co. Ltd. vs Income tax Officer	 Companies District I	 Calcutta & Another(1) that the High Court in appropriate cases has power to issue an order prohibiting the Income tax Officer from proceeding to reassess the income when the conditions precedent do not exist. At p. 207	 K. C. Das Gupta	 J.	 delivering the majority judgment of the Court observed: "It is well settled however that though the writ of prohibition or certiorari will not issue against an executive 13 authority	 the High Courts have power to issue in a fit case an order prohibiting an executive authority from acting without jurisdiction. Where such action of an exe cutive authority acting without jurisdiction subjects or is likely to subject a person to lengthy proceedings and unnecessary harassment	 the High Courts	 it is well settl ed	 will issue appropriate orders or directions to prevent such consequences". The High Court may	 therefore	 issue a high prerogative writ prohibiting the Income tax Officer from proceeding with re assessment when it appears that the Income tax Officer had no jurisdiction to commence proceeding. The condition which invests the Income tax Officer with jurisdiction has two branches: (i) that the Income tax Officer has reason to believe that income chargeable to tax has escaped assessment; and (ii) that it is in consequence of information which he has in his possession and that he has reason so to believe. Since the learned Judges of the High Court have concentrated their attention upon the second branch of the condition and have reached their conclusion in favour of the assessees on that branch	 it would be appropriate to deal with the correctness of that approach. The expression "information" in the context in which it occurs must	 in our judgment	 mean instruction or knowledge derived from an external source concerning facts or particulars	 or as to law relating to a matter bearing on the assessment. If as a result of information in his possession	 the Income tax Officer has reason to believe that income chargeable to tax had escaped assessment	 the Income tax Officer has jurisdiction to assess or reassess income under section 147(1)(b) of the Income tax Act	 1961. Information in his possession that income chargeable to tax has escaped assessment furnishes a starting point for assessing or reassessing income. If he has that information	 the Income tax Officer may commence proceedings for assessment or reassessment. To commence the proceeding for reassessment it is not necessary that on the materials which came to the notice of the Income tax Officer	 the pre vious order of assessment was vitiated by some error of fact or law. The High Court exercising jurisdiction under article 226 of the Constitution has power to set aside a	 notice issued under section 147 of the Income tax Act	 1961	 if the condition precedent to the exercise of the jurisdiction does not exist. The Court may	 in exercise of its powers	 ascertain whether the Income tax Officer had in his possession any information: the Court may also determine whether from that information the Income tax Officer may have reason to believe that income chargeable to tax had escaped assessment. But the jurisdiction of the Court extends no further. Whether on the information in his possession he should commence 14 a proceeding	 for assessment or reassessment	 must be decided by the Income tax Officer and not by the High Court. The Incometax Officer alone is entrusted with the power to administer the Act: if he has information from which it may be said	 prima facie	 that lie had reason to believe that income chargeable to tax had escaped assessment	 it is not open to the High Court	 exercising powers under article 226 of the Constitution	 to set aside or vacate the notice for reassessment on a re appraisal of the evidence. The High Court in this case was apparently of the view that the information in consequence of which proceedings for reassessment were intended to be started	 could have been gathered by the Income tax Officer in charge of the assessment in the previous years from the disclosures made by the two Hindu undivided families. But that	 in our judgment	 is wholly irrelevant. Justification of the Income tax Officer to reassess income arises if he has in consequence of information in his possession reason to believe that income chargeable to tax has escaped assessment. That information	 must	 it is true	 have come into the possession of the Income tax Officer after the previous assessment	 but even if the information be such that it could have been obtained during the previous assessment from an investigation of the materials on the record	 or the facts disclosed thereby or from other enquiry or research into facts or law	 but was not in fact obtained	 the jurisdiction of the Income tax Officer is not affected. The High Court was also of the view that the inference raised by the Income tax Officer that the Hindu undivided families of the assessees had made profit by sale of articles purchased from the assessees larger than the profit which the assessees had made	 was not justified	 since there was no evidence on the record about the price at which similar goods were sold by the assessees to other merchants and about the profit which those other merchants made by sale of those goods. But in a petition under article 226 of the Constitution the taxpayer may challenge the validity of a notice under section 147 of the Income tax Act	 1961	 on the ground that either branch of the condition precedent does not exist	 but an investigation whether the inferences raised by the Income tax Officer from the information are "correct or proper" cannot be made. Counsel for the Commissioner is	 therefore	 right in contending that the High Court entered upon an investigation of matters which were not within their competence. But the appeal of the Commissioner must still fail. The case of the Commissioner on the materials placed before the High Court	 suffers from a serious infirmity on the first branch of the jurisdictional condition. The averments made in the affidavit filed by the Income tax Officer in that behalf do not establish the existence of that branch of the condition. In reply to the averment by the 15 assessees that the Income tax Officer had no reason to believe that income had escaped assessment	 the Income tax Officer stated: "In the course of the discussions I had at the several meetings hereinabove referred	 I also learnt that in the earlier years also the petitioners (the assessees) had effected such sales to the said Hindu undivided families	 and that over and above the margin of profits earned by the petitioners (the assessees) from the Hindu undivided families	 the Hindu undivided families had earned substantial profits on the resale of such goods. 1	 therefore	 came to the conclusion that the creation of the Hindu undivided family business was merely a subterfuge or a contrivance by the partners of the petitioner firm (the assessees) to divert the huge profits made by the petitioners (the asses sees) on imported articles". The plea raised by the Income tax Officer is that income which could have been earned by the assessees was not earned	 and a part of that income was earned by the Hindu undivided families. That according to the Income tax Officer was brought about by "a subterfuge or contrivance". Counsel for the Commissioner contended that if by resorting to a "device or contrivance"	 income which would normally have been earned by the assessee is divided between the assessee and another person	 the Incometax Officer would be entitled to bring the entire income to tax as if it had been earned by him. But the law does not oblige a trader to make the maximum profit that he can out of his trading transactions. Income which accrues to a trader is taxable in his hands: income which he could have	 but has not earned	 is not made taxable as income accrued to him. By adopting a device	 if it is made to appear that income which belonged to the assessee had been earned by some other person	 that income may be brought to tax in the hands of the assessee	 and if the income has escaped tax in a previous assessment a case for commencing a proceeding for reassessment under section 147(1)(b) may be made out. Avoidance of tax liability by so arranging commercial affairs that charge of tax is distributed is not prohibited. A taxpayer may resort to a device to divert the income before it accrues or arises to him. Effectiveness of the device depends not upon considerations of morality	 but on the operation of the Income tax Act. Legislative injunction in taxing statutes may not. except on peril of penalty	 be violated	 but it may lawfully be circumvented. If the goods were nominally transferred to the Hindu undivided families the latter acting merely as benamdars for the assessees	 and the profits were earning in truth by the assessees	 income earned by sale of the goods by the Hindu undivided families may be held chargeable to tax as income which has escaped assessment to tax in 16 the hands of the assessees. In the present case		 no such case was attempted to be made out in the affidavit filed by the Income tax Officer. We hold	 therefore	 that on the materials on the record	 the Income tax Officer. had no reason to believe that income chargeable to tax had escaped assessment for the three years in question. The order passed by the High Court is therefore confirmed. There will	 however	 be no order as to costs in this Court and the High Court. G.C. Appeal dismissed.

The assessee firm consisted of two partners who were managers of their respective Hindu Undivided Families. The firm sold its goods to the aforesaid families and the families again sold the goods on their own account. In income tax proceedings for the years 1959 60	 1960 61 and 1961 62 the firm and the Hindu Undivided Families were separately assessed in respect of their incomes. Subsequently the Income tax Authorities took view that the sale of goods by the firm to the families was only a device to divert the profits of the firm and on this view issued notices under section 147 of the Incometax Act	 1961 requiring the assessee to show cause why the assessments for the years 1959 60	 1960 61 and 1961 62 should not be reopened. The High Court of Gujarat in a petition for a writ under article 226 of the Constitution quashed those notices and restrained the Income tax Officer from taking proceedings in pursuance thereof. With special leave granted by this Court	 the Revenue appealed. Held:(i) The High Court may issue a high prerogative writ prohibiting the Income tax Officer from proceeding with reassessment when it appears that the Income tax Officer had no jurisdiction to commence proceedings because the conditions precedent do not exist. [12G H; 13B C] Calcutta Discount Co. Ltd. vs Income tax Officer	 Companies District 1	 Calcutta	 & Anr. 	 followed. It is however not open to the High Court exercising powers under article 226 to set aside or vacate the notice for reassessment by itself re appraising the evidence. [15B] (ii)The condition which invests the Income tax Officer with jurisdiction has two branches: (i) that the Income tax Officer has reason to believe that income chargeable to tax has escaped assessment; and (ii) that it is in consequence of information which he has in his possession and that he has reason so to believe. The expression 'information ' in the context of which it occurs must mean instruction or knowledge derived from an external source concerning facts or particulars	 or as to law relating to a matter bearing on the assessment. If he has such information the Income tax Officer may commence proceedings under section 147(1)(b). But to commence such a proceeding it is not necessary that on the materials which came to the notice of the Income tax Officer	 the previous order of assessment was vitiated by some error of fact or law. [13C G] (iii)In the present case however the pre conditions for the issue of a notice of re assessment did not exist. The law does not oblige a trader to make the maximum profit that he can out of his 11 trading transactions. Income which accrues to a trader is taxable in his hands: income which he could have	 but has not earned is not made taxable as income accrued to him. Avoidance of tax liability by so arranging commercial affairs that charge of tax is distributed is not prohibited. [15D G]