Summarize the following court judgment. Appeal No. 9 of 1952. Appeal from the Judgment and Order dated 2nd January	 1950	 of the High Court of Judicature at Madras (Satyanarayana Rao and Viswanatha Sastri JJ.) in Case Referred No. 68 of 1946. M. C. Setalvad	 Attorney General for India	 (P. A. Mehta	 with him) for the appellant. K. section Krishnaswami Aiyangar (M. Subbaraya Aiyar	 with him) for the respondents. December 22. The Judgment of the Court was delivered by MAHAJAN J. This is an appeal from	the judgment of the High Court of Judicature at 'Madras in a reference made by the Income tax Appellate Tribunal under section 66 (1) of the Indian Income tax Act	 XI of 1922. 488 For several years prior to 1939 40 the respondents	 .who are. brothers	 had been carrying on in partnership the business of " The Hindu	 a daily newspaper of Madras. The profits of this business had been charged to income tax in the hands of the respondents under the Indian Income tax Act of 1918. The firm 's year of account was a period of twelve months ending with 30th June each year. In respect of the profits of the year of account ending 30th June, 1938, assessment was made in the year 1939 40 and the firm was charged to income tax for that assessment year. On 1st March, 1940, the respondents transferred their business as a going concern to a private limited company called  Kasturi and Co. Ltd." For the assessment year 1940 41 the respondents claimed that the firm was not liable to pay any income tax on the income of its business from the end of the accounting year ending 30th June	 1938	 to 29th February	 1940	 the date on which the limited company succeeded to the business of the firm (i.e.	 for a period of 20 months) under section 25 (4) of the Act	 as it had been assessed under the Indian Incometax Act	 1918. The Income tax Officer disallowed the claim and held that since the assessment pertained to the year 1940 41 the previous year with reference to that assessment would be the year ending 30th June	 1939	 and the period for which exemption could be claimed under section 25(4) of the Act was the interval from the end of that previous year	 i.e.	 1st July	 1939	 upto to the date of succession	 i.e.	 29th February	 1940	 i.e	 a period of eight months. This order was confirmed on appeal by the Appellate Assistant Commissioner. On further appeal the Tribunal held that on a proper construction of section 25(4) of the Act	 tax was not payable by the firm in respect of the profits and accounts of the business for the whole of the period from 1st July	 1938	 to 29th February	 1940	 (a period of 20 months). At the instance of the Commissioner of Income tax (the appellant) the Tribunal stated a case to the High Court and referred to it the following question for its opinion: 489 " Whether on the facts of this case	 the Appellate Tribunal was right in holding that the period the profits of which were entitled to exemption from the payment of tax under section 25(4). of the Indian .Income tax Act	 1939	 was the period commencing from 1st July	 1938	 and ending. With 29th February	 1940. " The reference was heard by Satyanarayana Rao and Viswanatha Sastri JJ. and they delivered divergent opinions on the question referred. Satyanarayana Rao J. agreed with the conclusion of the Tribunal and answered the question in the affirmative	 while Viswanatha Sastri J. answered the question in the negative	 with the result that under the provisions of the law the Tribunal 's order was confirmed	 it being in accordance with the opinion delivered by the senior Judge. Leave to appeal to this Court was granted and this appeal is before us on a certificate given by the High Court. The principal question to decide in this appeal is whether on a true construction of section 25(4) of the Act	 and on the facts stated the period the profits of which were entitled to exemption from the payment of tax is the period between 1st July	 1939	 to 29th February	 1940	 (a period of eight months) or the period commencing from 1st July	 1938	 and ending with 29th February	 1940 (a period of 20 months). To decide this question it is necessary to set out the relevant provisions of the Act. Section 2(11)	 which defines " previous year " in so far as it is relevant for purposes of this appeal is : " (11) (a) the twelve months ending on the 31st day of March next preceding the year for which the assessment is to be made	 or	 if the accounts of the assessee have been made up to a date within the said twelve months in respect of a year ending on any date other than the said 31st day of March	 then at the option of the assessee the year ending on the day	 to which his accounts have so been made up." 490 Section 3 of the Act provides: Where any Central Act enacts that income tax shall be charged for any year at any rate or rates	 tax at that rate or those rates shall be charged for that year in accordance with	 and subject to the provisions of	 this Act in respect of the total income of the previous year of every individual	 Hindu undivided family	 company and local authority	 and of every firm and other association of persons or the partners of the firm or the members of the association individually. " This is the charging section. Section 25 of the Act makes different provisions to cover some special cases. The parts of the section relevant to this appeal pro vide as follows: (1)Where any business	 profession or vocation to which sub section (3) is not applicable	 is discontinued in any year	 an assessment may be made in that year on the basis of the income	 profits or gains of the period between the end of the previous year and the date of such discontinuance in addition to the assessment	 if any	 made on the basis of the income	 profits or gains of the previous year. (3) Where any business	 profession or vocation on which tax was at any time charged under the provisions of the Indian Income tax Act	 1918 (VII of 1918)	 is discontinued	 then	 unless there has been a succession by virtue of which the provisions of sub section (4) have been rendered applicable no tax shall be payable in respect of the income	 profits and gains of the period between the end of the previous year and the date of such discontinuance	 and the assessee may further claim that the income	 profits and gains of the previous year shall be deemed to have been the income	 profits and gains of the said period. Where any such claim is made	 an assessment shall be made on the basis of the income	 profits and gains of the said period	 and if an amount of tax has already been paid in respect of the income	 profits and gains of the previous year exceeding the amount payable on 491 the basis of such assessment	 a refund shall be given of the difference. (4) Where the person who was at the commencement of the Indian Income tax (Amendment) Act	 1939 (VII of 1939)	 carrying on any business	 profession or vocation on which tax was at any times charged under the provisions of the Indian Incometax Act	 1918	 is succeeded in such capacity by another person	 the change not being merely a change in the constitution of a partnership	 no tax shall be payable by the first mentioned person in respect of the income	 profits and gains of the period between the end of the previous year and the date of such succession	 and such person may further claim that the income	 profits and gains of the previous year shall be deemed to have been the income	 profits and gains of the said period. Where any such claim is made	 an assessment shall be made on the basis of the income	 profits and gains of the said period	 and	 if an amount of tax has already been paid in respect of the income	 profits and gains of the previous year exceeding the amount payable on the basis of such assessment	 a refund shall be given of the difference. (6) Where an assessment is to be made under subsection (1)	 sub section (3)	 or sub section (4) the Income tax Officer may serve on the person whose income	 profits and gains are to be assessed	 or	 in the case of a firm	 on any person who was a member of such firm at the time of its discontinuance	 or	 in the case of a company	 on the principal officer thereof	 a notice containing all or any of the requirements which may be included in a notice under sub section (2) of section 22	 and the provisions of this Act shall	 so far as may be	 apply accordingly as if the notice were a notice issued under that sub section. " For a proper construction of section 25 it is also necessary to set out the history and object of this enactment. Under the Act of 1918 income tax was levied on the income of the current year	 i.e.	 the year of 492 assessment but as the income of that year could not be known till after the expiry of the year	 the assessment was made on the basis of the income of the " previous year" but after the close of the assessment year an 	adjustment used to be made on the basis of the income of the assessment year. The Act of 1922 introduced a change in this respect. Under section 3 of the Act	 'the income of the previous year is made the subject of the charge and tax is levied on the income of the previous year though it is a tax for the assessment year. On the passing of the Act of 1922	 the previous system of assessment was kept alive for one year. The result was that for the year 1922 23	 there were two assessments	 one under the Act of 1922 on the income of 1921 22 and another under the old system byway of assessment on the income of the same year 1921 22. In other words	 the income of the year 1921 22 was assessed twice	 once under the Act of 1918	 and again under the Act of 1922. To remove this anomaly and in order to make the number of assessments tally with the number of years during which the business existed	 section 25(3) of the Act of 1922 was enacted exempting from tax the profits for the period between the end of the previous year and the date of discontinuance in the case of a business whose profits had been assessed to tax under the Act of 1918. There was no provision in section 25 as enacted in 1922 for giving any relief in cases of succession to a business which was taxed under the Act of 1918. In 1939 a provision was made to extend similar relief to cases of succession and with this object section 26(2) of the Act was amended and section 25(4) was added by the amending Act of 1939. The result of the amendment of section 26(2) and the insertion of section 25(4) is that upon a transfer of business the transferor	 i.e.	 the person who was succeeded in the business	 would get the same relief as if the business had been discontinued by him. The scheme of the Act is that by the charging section	 i.e.	 section 3	 income tax is levied for a financial year at the rate prescribed by the annual Finance Act 493 on the total income of the previous year of every in dividual	 etc. Each previous year 's income is the	 subject of separate assessment in the relative assessment year. Though the year of assessment is the financial year	 the previous year of an assessee need not necessarily be the previous financial year	 for this expression is to be understood as defined by section# 2(11) (a) of the Act. The respondents were duly assessed to tax for the year of assessment	 i.e. the financial year 1939 40	 on the income of the previous year ending on 30th June	 1938. Their income of the accounting year ending 30th June	 1939	 would in the ordinary course be liable to assessment in the financial year 1940 41	 and the profits of the year ending 30th June	 1940	 would be assessable in the financial year 1941 42. Succession took place in the accounting year 1939 40. Under sub section (2) of section 26	 as it stood before its amendment in 1939	 the person succeeding to a business was liable to tax for the year of succession	 as if he had been carrying on business throughout that year and had received the profits of the whole of that year. Thus Kasturi and Company Limited would have been liable to be assessed on the profits earned during the year ending 30th June	 1940	 irrespective of the fact that actually they would have only received profits in that year for a period of four months. After the amendment in 1939 sub section (2) of section 26 provides that the person succeeded and the person succeeding " each be assessed in respect of his actual share	 if any	 of the income	 profits and gains of that year. " Thus the profits of the year in which the succession occurs are to be apportioned between the predecessor and the successor according to the actual share of each in the year 's profits	 the predecessor and the successor are each liable to tax at the rate applicable to each and the profits of each have to be computed separately in accordance with the provisions of section 10 and other sections and each has to be granted the deductions and allowances appropriate to his case	 and 494 assessment on each has to be separate and distinct. If the business was charged under the Indian Incometax Act	 1918	 and the person succeeded is exempt from tax under section 25 (4) he would not charged in respect of the profits of the period from the end of the previous year up to the date of succession	 while the person succeeding would be liable under sub section (2) of section 26 in respect of the profits earned by him after the date of succession. The proviso to sub section (2) lays down two exceptions to the general rule that the successor is not liable to tax in respect of the profits of the period prior to the date of succession. In two cages	 namely	 (1) when the predecessor cannot be found	 or (2) when the tax assessed on the predecessor cannot be recovered from him	 the successor is liable to pay the tax in respect of the profits of the year in which the succession took place up to the date of succession as well and further for the profits earned during the year preceding that year. In this case if either of those contingencies arose	 Kasturi and Company Limited would have been liable to pay tax on profits of the whole accounting year ending 30th June	 1939	 as well as of the whole of the accounting year ending 30th June	 1940	 and end of the preceding year in this context would be 30th June	 1939. It is a question whether in this situation they would be entitled to the relief provided in section 25(4). On behalf of the Commissioner of Income tax	 Madras	 the learned Attorney General contended that Satyanarayana Rao J. was in error in granting exemption to the firm from tax in respect of the profits earned during a period of 20 months and that under section 25	 sub section (4)	 the only relief permissible was in respect of profits earned during the period of 8 months from 1st July	 1939	 to 1st March	 1940. It was said that the profits of the year of succession were liable to assessment in the usual course in the financial year 1941 42 and the Income tax Officer had no power to make an accelerated assessment in order to give relief to the persons succeeded in the business 495 and that being so	 it was not right to hold that the expression " previous year" in section 25	 sub section (4)	 was co related to the assessment year 1939 40	 i.e the year in which	the succession took place or to the assessment year 1941 42 in which in the ordinary course assessment for those profits would have been made but that on a true construction of this sub section and having regard to the history of its enactment and the object for which it was inserted in section 25	 the assessee firm was entitled to exemption from the payment of tax	 only for the period between 1st July	 1939	 and 29th February	 1940	 and to no more. It seems to us that there is force in this contention	 Section 25 (4) was inserted in the Act of 1922 in the year 1939 at the same time as section 26(2) was amended. On a plain reading of these two sections together	 it is quite clear that the Income tax Officer is not empowered to make an accelerated assessment in the year in which succession occurs on the ' profits of that year	 and prematurely assess the person succeeding to a business so that he may able to give ' relief to the person succeeded. The exemption provided for its section 25 (4) and the apportionment mentioned in section 26 (2) have to be made in the assessment year in which the profits of the year of succession fall to be assessed under sections of the Act	 and in this situation the end of the 'previous year in this case can	 in no circumstance	 be the end of the accounting year beginning 1st of July	 1937	 and ending 30th of June	 1938	 because the income	 profits and gains of the accounting year of succession (i.e.	 year beginning 1st July	 1939	 and ending 30th June	 1940) which have to be apportioned between the predecessor and successor of the business under section 26(2) and for which the successor becomes liable in case the predecessor commits a default	 could only be assessed in the assessment year 1941 42. The income	 ' profits and gains of the accounting year beginning 1st July	 1938	 and ending 30th June	 1939	 for which the predecessor alone is liable in the first instance to 496 tax fall for assessment in the assessment year 1940 41. The successor in business	 in case of default by the predecessor	 is also liable to pay the tax on the profits of that year as well. What subjection (4) of section 25 provides is that when the profits of the year of succession fall to be assessed	 the predecessor of a business can claim exemption from liability to pay tax on the profit earned from the end of the previous year to the date of succession	 the "Previous year" here meaning the completed accounting year immediately preceding the date of succession (in this case year ending 30th June	 1939). He can further claim that the profits earned between 1st July	 1939	 to 29th February	 1940	 be deemed the profits of the accounting year 1st July	 1938	 to 30th June	 1939	 and if on those profits in assessment year 1940 41 tax in excess of what is chargeable on the profits of this broken period has been paid	 be given refund for the excess. Truly speaking	 the firm was entitled to the relief provided for in section 25(4) in the assessment year 1941 42 but the Income tax Officer was prepared to give him that in the assessment year 1940 41	and on that score the assessee can have no grievance. Satyanarayana Rao J. held that the words " previous year " in sub . section (1) of section 25 refer to the year of account relevant to the year of assessment in which the discontinuance occurs	 that the section authorises the Income tax Officer to make a cumulative assessment in respect of the profits of the period between the end of the last accounting year of which the profits have been assessed before the date of discontinuance and that date	 that " sub section (3) of section 25 is an exception to the general rule contained in sub section (1) of that section	 and that	 though the language employed in sub section (3) does not correspond to the language employed in sub section (1) indicating that in this Sub section also the assessment year should be taken to be the year in which the discontinuance occurs	 all the same there is no reason 497 to depart and to place a different interpretation on the expression 'previous year ' in this sub section$ from the one placed on sub section (1). " On the same line of reasoning the learned Judge gave the same meaning to the expression " previous year " in subsection (4) of section 25 and as a result held that the firm was 'entitled to exemption from tax for profits earned between the 1st July	 1938	 and 29th February	 1940	 a period of 20 months. Mr. Krishnaswami Aiyangar appearing for the respondents	 was not prepared to support the whole of the reasoning of Satyanarayana Rao J. but he contended strenuously that the conclusion reached by the learned Judge was the only one that could be reached on a true construction of the phraseology employed in the various sub sections of section 25. In short	 his argument was that sub section (1) of section 25 confers an option on the Income tax Officer	 in case of discontinuance of a business which was not assessed under the Act of 1918	 to make an accelerated assessment in the year of discontinuance itself on the income	 profits and gains earned up to the period of discontinuance and not assessed before in any preceding assessment year; that the expression " previous year" in the context of this sub sec tion means the end of the accounting year the profits of which have been last assessed to tax	 which in this case means the year ending 30 th June	 1938. It was further contended that any other meaning given to these words would create a hiatus and would lead to the result that on the date of discontinuance the Income tax Officer would be entitled to assess the profits of the broken period without being entitled to assess the profits of a whole previous year that had expired	 the profits of which in the usual course could not be assessed in the year of discontinuance and that such a construction would defeat the very purpose of the power given by the sub section. On a parity of reasoning it was suggested that the words "between the end of the previous year and the date of such discontinuance" in subsections (3) and (4) 498 should be given the same meaning as in sub section (1)	 and that the assessee should be given exemption in respect of profits earned between the 1st July	 1938	 and 29th February	 1940. It was said that the two terminals fixed for the purposes of assessment under section 25(1) were the terminals fixed for exemption from tax in section 25(3) and (4) and it would be wrong to hold that the assessment under section 25(1) could be made for a period different from that for which relief could be given under section 25 (3) and (4). It was urged that the scope of the charge authorised by section 25 (1) was co extensive with the extent of the relief provided for in subsections (3) and (4). Before proceeding further it is convenient to make a few observations regarding the proposition stated by Satyanarayaua Rao J. that section 25 (1) provides for cumulative assessment in cases of discontinuance of business. The words of the section do not justify this conclusion. They do not empower the Incometax Officer to make a cumulative assessment in respect of profits earned in two different accounting periods or entitle him to merge the profits of two years into one total sum and apply to them the rate of one of the financial years. All that the section authorises the Income tax Officer to do is that it gives him an option to make a premature assessment on the profits earned up to the date of discontinuance in the year of discontinuance itself instead of in the usual financial year. This assessment he is entitled to make in addition to the normal assessment for the financial year of discontinuance. Mr. Aiyangar very rightly conceded that the construction placed on subsection(1) of section 25 by the learned Judge in this respect was not right. As regards the main contention of Mr. Aiyangar based on the analogy of the language employed in sub section (1) of section 25	 we are of the opinion that this contention is based on a fallacy and cannot be sustained. As above pointed out	 sub section (1) of section 25 merely empowers the Income tax Officer	 499 if he so chooses to do	 to make an accelerated assessment in case of discontinuance of business at the time of discontinuance to save loss of revenue by the disappearance of an assessee. In other words	 the subsection imposes a liability of premature assessment on the assessee. It confers no benefit on him. Sub sections (3) and (4) of section 25 have a different end in ' view and are not in pari materia with sub section (1). They are in the nature of substantive provisions intended to give relief from tax charged in certain cases. The mere circumstance of their being grouped together with sub section (1) in section 25 cannot lead to the conclusion that the provisions therein contained are of the same nature and character as the provi sions contained in sub section (1). Satyanarayana Rao J. was clearly in error when he held these two subsections were in the nature of exceptions to the rule laid down in sub section(1). The truth of the matter is that it is sub section(1) itself which is an exception to the general rule laid down in the charging section of the Act	 namely	 section 3. The object of sub sections (3) and (4) is to provide relief to a business for the double assessment suffered by it in the financial year 1922 23 and it is entitled to this relief in the year of assessment in which the income and profits of the accounting period in which discontinuance or succession takes place fall to be assessed. The Income tax Officer is not authorised to accelerate the relief by making a premature assessment on these profits. Not only is the language of these two sub sections different from the language of sub section (1)	 but they deal with two different categories of assessees. Sub 'section (1) deals with a category of assessees who were never subjected to double tax	 while sub sections (3) and (4) deal with that class who suffered assessment under the Act of 191.8 and paid double tax. The liability for premature assessment imposed under section 25 (1) on the former class of assessees has feed imposed on considerations entirely different from those on which provision has been made for exemption to tax in sub sections 65 500 (3) and (4) for the other class. In	 these circumstances	 such relief cannot be said to be co extensive with the liability imposed. Moreover	 the provisions of the Income tax Act in respect to exemptions and deductions cannot be construed on the 'analogy of the provisions contained in the charging sections of the Act even if the language of these provisions is similar. Mr. Aiyangar 's contention that sub section (1) crystallizes the rights of the assessee on the date of discontinuance and that not only does it relieve him from being taxed after the date of discontinuance	 but that it entitles him to further relief provided for in sub section (3) does not seem to be well founded. Sub section (1) of section 25 confers no right of any kind on an assessee which can crystallize on the date of discontinuance and which cannot be varied subsequently to his disadvantage. On the other hand	 as already said it imposes a premature burden on the assessee which but for this sub section he could not be called upon to bear till the appropriate year of assessment was reached. The learned Attorney General was not prepared to accept the construction placed on Sub section (1) of section 25 by Mr. Aiyangar and contended that sub section did not authorise the Income tax Officer to make an assessment in the year of discontinuance on the profits of an accounting year which had come to a close before the date of discontinuance	 and that those profits had to be assessed in the usual way in the appropriate financial year	 and that authority given to make an accelerated assessment only related to the broken period beginning with the end of the completed accounting year immediately preceding the date of discontinuance and ending with the date of discontinuance. In our opinion	 it is not necessary for the purposes of deciding this case to finally express an opinion as to the true meaning of the words " between the end of the previous year to the date of discontinuance " used in section 25 (1) of the Act. After a careful consideration of the different provisions of the Act relevant to this enquiry	 we have 501 reached the conclusion that the expression "end of the previous year " in sub sections (3) and (4) of section 25 in the context of those sub sections means the end of an accounting year (a period of full 12 months) expiring immediately preceding the date of discontinuance or succession	 (in this case 30th. June	 1939). We are satisfied that Viswanatha Sastri J.". was right when he held that having regard to the object of the legislature in enacting sub sections (3) and (4) of section 25 and having regard to the plain language of these sub sections	 the assessee 's contentions could not be upheld. We are	 however	 unable to subscribe to the conclusion reached by the learned Judge that the expression " previous year " in subsections (3) and (4) of section 25 was co related to the year of assessment 1940 41. The profits of the year of discontinuance could not	 according to the scheme of the Act	 be taxed till the financial year 1941 42 and the previous year co related to that assessment year would be the accounting year ending 30th June	 1940. It is obvious that the 'end of the accounting year falling after the date of discontinuance could not appositely be said to be the end of the previous year preceding that date. The expression ((previous year" substantially means an accounting year comprised of a full period of twelve months and usually corresponding to a financial year preceding the financial year of assessment. It also means an accounting year comprised of a full period of twelve months adopted by the assessee for maintaining his accounts but different from the financial year and preceding a financial year. For purposes of the charging sections of the Act unless otherwise provided for it is co related to a year of assessment immediately following it	 but it is not necessarily wedded to an assessment year in all cases and it cannot be said that the expression "previous year" has no meaning unless it is used in relation to a financial year. In a certain context it may well mean a completed accounting year immediately preceding the happening of a contingency. The construction we have placed on 502 this expression in sub sections (3) and (4) of section 25 is in accord with the substance of the definition given in section 2 (1 1) of the Act. Any other construction of the section is bound to lead to a number of anomalies	 the most glaring being that in case of persons whose year of account is the financial year	 exemption from tax under section 25 (3) or (4) could never be given for a period of more than twelve months	 while in case of persons who adopt different accounting year	 exemption would become available for a period extending up to 24 months. Such could never have been the intention of the framers of the Act. That the "previous year" in the context of section 25(3) and (4) means a completed accounting year immediately preceding the discontinuance or succession is borne out by the provisions as regards nonliability for tax for the broken period and the 'claim to be made by the assessee that the income	 profits and gains of the previous year shall be deemed to have been the income	 profits or gains of the broken period. The intention of the legislature being to give relief against double assessment for the year 1922 23	 the assessee in the case of discontinuance or succession would be entitled to claim exemption from payment of tax for the broken period and also claim that the income	 profits or gains of the previous year	 i.e.) the year preceding the broken period	 should be treated as the income	 profits or gains of the broken period. Reference was made in the judgment of the Appellate Tribunal to the views of the Select Committee when clause (1) of section 25 was considered at the time of the draft Bill No. XXVI of 1921 in support of its conclusion	 but it was rightly held by the High Court that it was not a permissible consideration in interpreting a statute and Mr. Aiyangar did not seriously press this matter before us. He	 however	 drew our attention to the directions contained in the Income tax Manual in force for a number of years and contended that the department itself placed on sub sections (3) and (4) of section 25 the same construction as was 503 placed on them by the senior Judge in the High Court and that was the true construction of these two sub sections. This argument	 in our opinion	 has no ' validity. The department changed its view subsequently and amended the manual. The interpretation placed by the department on these sub sections cannot be considered to be a proper guide in a matter like this when the construction of a statute is involved. The result is that we allow the appeal and hold that the answer given by the senior Judge to the question referred was wrong and that the answer given by Viswanatha Sastri J. was the correct one. In the circumstances of this case we would make no order as to costs throughout. Appeal allowed. Agent for the respondent : M. section K. Aiyangar.

Two brothers who had been carrying on in partnership a business	 which had been assessed to income tax under the Indian Income tax Act of 1918 and the accounting year of which was a period of 12 months ending on the 30th June each year	 transferred the business to a limited company on the 1st March	 1940	 and claimed in the assessment for the year 1940 41 that under section 25 (4) of the Income tax Act	 1922	 they were not liable to pay income tax on the income of their business from 1st July	 1938	 up to 29th February	 1940	 a period of 20 months. The Income tax authorities were of the view that exemption could be claimed only 487 for the period from 1st July	 1939	 to 29th February	 1940	 a period of 8 months: Held	 that the expression "end of the previous year" in sub sections (3) and (4) of section 25 in the context of those sub sections means the end of the accounting year (a period of full 12 months) expiring immediately preceding the date of discontinuance or succession and the assessee firm was entitled to claim exemption from tax only in respect of the period from the 1st July	 1939	 to the 29th 'February	1940	 On a true construction of sections 25 and 26	 the Income tax Officer is not empowered to make an accelerated assessment in the year in which succession occurs on the profits of that year and prematurely assess the successor so that he 	 may be able to give relief to the person succeeded. The exemption provided for in section 25 (4) and the apportionment mentioned in section 26 (2) have to be made in the assessment year in which the profits of the year of succession fall to be assessed under section 3 of the Act. For the purposes of the charging sections of the Act the ex pression "previous year" is co related to a year of assessment immediately following it	 but it is not necessarily wedded to an assessment year in all cases and it cannot be said that the expression "previous year" has no meaning unless it is used in relation to a financial year. In a certain context it may well mean a completed accounting year immediately preceding the happening of a contingency.