Summarize the following court judgment. Appeal NOS. 467 470 & 470A of 1971. (Appeals by Special Leave from the Judgment and Order dated 3 3 1970 of the Andhra Pradesh High Court in case Ref. No. 8 of 1967.) G.C. Sharma	 P.L. Junels and R.N. Sachthey	 for the appel lant in all the appeals. N. A. Palkhivala	 Y.V. Anjaneyulu	 Mrs. A. K. Verma	 A. Subba Rao	 Ravinder Narain	 I. B. Dadachanji	 and O.C. Math ur	 for the respondents in all the appeals. The Judgment of the Court was delivered by BHAGWATI	 J. These appeals by special leave are directed against a judgment of the High Court of Andhra Pradesh answering certain questions referred to it by the Tribunal in favour of the assessee. The questions are of some impor tance and complexity and they turn on the true 739 interpretation of sections 3 and 21 of the Wealth Tax Act	 1957 but 	since they can be answered only by applying the correct interpretation to the facts of the case	 it is necessary to briefly recapitulate the facts giving rise to these appeals. In the year 1950 the late Nawab Sir Mir Osman Ali Khan Bahadur	 The Nizam of Hyderabad and Berar created several trusts out of which we are concerned in these appeals with the trust known as the Family Trust. The Nizam	 by a Deed of Trust dated 16th May	 1950	 created the Family Trust by transferring a corpus of Rs. nine crores in Government securities to the trustees constituted by him. The corpus was notionally divided into 175 equal units	 of out of which five units constituted a Fund called the 'Reserve Fund ' 31/2 units constituted a 'Family Trust Expenses Fund and the remaining 166 1/2 units were allocated amongst the relatives mentioned in the first column of the Second Schedule in the manner specified in that Schedule	 the number of units allocated to each individual relative being that mentioned in the second column. The Second Schedule was divided into two parts. Part I specified the names of the Nizam 's wife Laila Begum	 her five sons and two daugh ters and his another wife Jani Begum and her minor son as beneficiaries and in Part II were mentioned the names of the other wives	 sons	 daughters	 daughters in law	 sons in law	 would be sons inlaw and certain other ladies of the Palace. None of the beneficiaries mentioned in the Second Schedule	 whether in Part I or Part II	 was to be entitled to the corpus of the units allocated to him or her. Each was entitled to be paid the income from the units allocated to him or her and detailed provisions were made for the manner in which the units were to devolve after his or her death. Clause (4) of the Trust Deed provided that 30 out of 1661/2 units shall be allocated amongst the relatives mentioned in Part I of the Second Schedule in such manner that one unit each shall be allocated to Laila Begum and Jani Begum	 two units each shall be allocated to the daugh ters of Laila Begum and four units each shall be allocated to the five sons of Laila Begum and the minor son of Jani Begum. So far as one unit allocated to Laila Begum was concerned	 the trustees were directed by sub clause (a) of clause (4) to pay the income of this one unit to Laila Begum during her life time and after her death	 it was to be divided into 12 equal parts and 2 equal parts each were to be added to the four units allocated to each of her five sons and one equal part each was to be added to the two traits allocated to each of her two. daughters to be held upon the same trusts as those declared in respect of the original units allocated to each son or daughter as the case may be. Each of the five sons of Laila Begum was allocated four units and under sub clause (b) of clause (4) it was provided that the income from these four units	 supplemented by parts out of Laila Begum 's unit on her death	 shall be paid to the respective son during his life time and on and after his death	 the corpus of the four units allocated to him together with the parts out of Laila Begum 's unit added to it	 shall be divided amongst his children or remot er issues per stirpes in the proportion of two shares for every male child to one share for every female child stand ing in the same degree of relationship. If such son died without leaving any child or remoter issue him surviving	 sub clause (b) of clause (4) provided that the trustees shall divide the four units allocated to him together with the 8 707 SCI/77 740 subsequently added parts out of Laila Begum 's unit into such sub parts and in such manner that they shall allocate two equal sub parts each to each of the then surviving sons of Laila Begum by the settlor and the issue then surviving of any pre deceased son and one equal sub part each to each of the then surviving daughters of Laila Begum by the settlor and the issue then surviving of any pre deceased daughter. The parts of such surviving sons and daughter of Laila Begum as are specified in the Second Schedule were to be added to and amalgamated with the basic units	 four or two as the case may be	 allocated to them and they were to be held on the same trusts as those declared in respect of such basic units. So far as concerns the sub parts allocated to the surviving sons and daughters of Laila Begum who were born after the date of the Trust Deed	 it was directed that such sub parts would be taken by them absolutely and so also the sub parts allocated to the issue of any pre deceased son or daughter of Laila Begum were to be divided between them absolutely per stirpes in the proportion of two shares for ' every male child to one share for every female child stand ing in same degree of relationship. Sub clause (c) of clause (4) made similar provisions with regard to the two units allocated to each of the two daughters of Laila Begum. The income of the two units together with the subsequently added parts out of Laila Begum 's unit was to be given to the respective daughter for her life time and on her death	 the corpus was to be divided amongst her children and remoter issue per stirpes in the proportion of two shares for every male child to one share for every female child standing in the same degree of relationship and if she died without leaving any issue her surviving	 the corpus was to be divid ed into such sub parts and in such manner that one equal sub part was to go to each of the then surviving children of Laila Begum by the settlor and the issue then surviving of any pre deceased son or daughter. The other provisions in regard to the interest taken by these beneficiaries in the corpus were the same as in sub clause (b) of clause (4). Subclause (d) of clause (4) dealt with the unit allocated to Jani Begum and provided that the income of this unit would go to Jani Begum during her life time and on her death	 the corpus of this unit would be added to and amalgamated with the four units allocated to her minor son Imdad Ali Khan to be held upon the same trusts as those declared in respect of those four units and if neither Imdad Ali Khan nor any child or remoter issue of his was living at the date of the death of Jani Begum	 then this one unit of Jani Begum was to be held upon the same trusts as the one unit allocated to Laila Begum on her death. Similarly	. sub clause (e) of clause (4) provided that the income of the four units allocated to Imdad Ali Khan shall be paid to him during his life time and on his death	 the corpus shall be divided amongst his chil dren and remoter issue per stirpes in the proportion of two shares for every male child to one share for every female child standing in the same degree of relationship and if he does without leaving any child or remoter issue him surviv ing	 the corpus shall be held on the same trusts as those upon which the four units allocated to any of the five sons of Laila Begum are held on the death of such son without leaving any child or remoter issue him surviving. It will thus be seen that detailed and elaborate provisions were made in the Trust Deed regarding the disposition of the different units allocated to the various beneficiaries specified in Part 741 I of the Second Schedule and every contingency was taken care of in laying down the mode of devolution	 so that at any particular point of time could always say who would be the beneficiaries entitled to the corpus	 if the owner of the life interest were to die at that point of time. The remaining 1361/2 units left after the allocation of 30 units as set out in clause (4) were dealt with in clause (5) of the Trust Deed. These 1361/2 units were allocated to the respective relatives of the settlor specified in Part II of the Second Schedule in the respective proportions set out.against their names. Sub clause (a) of clause (5) provided that the income of the respective unit or units or fraction thereof allocated to the respective relative shall be paid to them respectively for life. But so far as the 15 daughters of the settlor were concerned	 to each of whom three units were allocated	 it was provided that out of the income of such three units	 each daughter was to be paid only 2/3rd part of the income and the remaining 1/3rd part was to be set apart by way of a reserve fund. Such reserve fund was to be utilised for any special	 unusual	 unforeseen or emergency expenses relating to the particular daughter from whose income the reserve fund was created and on her death	 the	reserve fund or the unutilised portion thereof was to. be amalgamated with the three units of the corpus allocated to her	 to be held on the same trusts as those declared in respect of such three units. There was also a special provision made regarding Nawab Rashid Nawaz Jung	 the son in law of the settlor	 that	 though allocated one unit	 he was not to receive the income of that unit so long as he received the allowance as Amir of the Vikar al Mulk Paigah and till then	 the income of this unit was to be added to the five units allocated to the Reserve Fund creat ed under clause (6) to be held upon the same trusts as those declared in respect of such Reserve Fund. The other son inlaw and the future husbands of the 13 other daughters of the settlor were also allocated 1/2 unit each and it was provided that until the marriage of each of these 13 daugh ters	 the income of 1/2 unit allocated to her future husband should be set apart as a reserve fund and utilised in the same manner as the Reserve Fund of such daughter created out or one third part of the income of the three units allocated to her and after her marriage	 the income of such 1/2 unit should be paid to her husband. So far as Fauzia Begum	 the daughter of the second son of the settlor was concerned	 a special provision was made that the income of two units allocated to her should be set apart and credited in her account called 'Fauzia Begum Reserve Fund ' and on the death of the second son of the settlor during the minority of Fauzia Begum	 the income of these two units should be paid to a committee of management for the maintenance	 education	 welfare	 advancement in life and benefit of Fauzia Begum until she attained the age of majority and during the minor ity of Fauzia Begum	 the trustees. were also authorised to spend out of the Reserve Fund such sums as may be necessary for any special. unusual	 unforeseen or emergency expenses for her benefit and on Fauzia Begum attaining the age of majority	 the trustees were to hand over the reserve fund or the unutilised portion thereof to her absolutely and also to pay to her the income of the two units during her life time. Sub clause (b) of clause (5) provided for the devolution of the respective unit or units or fraction thereof allocated 742 to the respective relatives on their death. It was directed that on the death of any of these relatives	 the corpus of the unit or units or fraction thereof allocated to him or her should be divided 'and distributed	 subject to some restrictions	 amongst the children and remoter issue per stirpes in the ratio of 2:1 as between male and female children standing in the same degree of relationship. The contingency of any of these relatives dying without leaving any child or remoter issue him or her surviving. was dealt with in sub clause (c) of clause (5) which provided that in the event the unit or units or the fraction thereof allocat ed to such relative should be divided amongst the other relatives of the settlor but in accordance with certain specified rules. Sub clause (d) of clause (5) made a spe cial provision in regard to Dulhan Pasha Begum	 namely	 that on her death	 the five units allocated to her should be added to and amalgamated with the four units allocated to her daughter Shahzadi Begum	 to be held upon thus be seen that according to the scheme envisaged in clause (5)	 each of the settlors specified in Part II of the Second Schedule was given life interest in the unit or units or fraction thereof allocated to him or her and on his or her death	 subject to certain special provisions in regard to some of the relatives	 the corpus of such unit or units or fraction thereof was to be divided and distributed amongst the chil dren or remoter issue and if any of the relatives died without leaving any child or remoter issue him or her sur viving	 the corpus allocated to him or her was to go to the other relatives in accordance with certain specified rules. Clause (6) of the Trust Deed directed the trustees to hold 5 units out of the corpus of the trust fund aS and by way of a Reserve Fund	 This Reserve Fund was primarily intended to meet special	 unusual	 unforeseen or emergency expenses of or for the benefit of the relatives of the settlor specified in the Second Schedule and it was also provided that if there was any deficit in the Family Trust Expenses Account in meeting the charges of collection	 the remuneration of the trustees and the members of the commit tee of management and other costs	 charges	 expenses and outgoing in connection with the trust	 such deficit should be made good out of the income or the corpus of the Reserve Fund. There was also a provision made that on and after the death of any of the relatives of the settlor specified in the Second Schedule	 a corresponding proportion of the Reserve Fund should be added to and amalgamated with the unit or units or fraction thereof allocated to such relative and held on trusts similar to the original trust. The remaining 31/2 units were allocated under clause (7) of the Trust Deed to a fund called 'The Family Trust Ex penses Account '. This fund was intended to meet all the charges for the collection of the income of the trust fund and the remuneration of the trustees and the members of the committee of management and all the costs	 charges and expenses and outgoings relating to the trust and its admin istration. It was also directed that after all the afore said trusts relating to the 30 units	 136 1/2 units and 5 units out of the corpus of the trust fund had been fully administered and carried out and the corpus of all such units had been handed over and transferred absolutely to the ultimate beneficiaries	 the 743 trustees should transfer and hand over 31/2 units comprising this fund to the then successor in title of the settlor or to the eldest male descendant in the direct male line of succession of the settlor according to the rule of primoge nature. During the course of assessment of the trustees (herein after referred to as the assessees) to wealth tax for the assessment year 1957 58	 a question arose as to how the assessment to wealth tax should be made. The Wealth Tax Officer assessed the assessees to wealth tax on the value of 131/2 units of the trust fund comprising 5 units allocated to the Reserve Fund	 31/2 units allocated to the Family Trust Expenses Account and 5 units representing the units allocated to the future husbands of the then unmarried daughters of the settlor. The wealth corresponding to the remaining 1611/2 units was assessed in the hands of the several beneficiaries specified in the Second Schedule	 who were assessed to wealth tax on the value of the respective units allocated to them under the Trust Deed. Similar assessments were also made for the assessment year 1958 59 with this difference that by the time these assessments came to be made	 one other daughter was also married and the Wealth Tax Officer	 therefore	 assessed the assessees to wealth tax only in respect of the value of 13 units of the Trust Fund and the values of the other units were assessed in the hands of the respective beneficiaries to whom they were allocated as specified in the Second Schedule. There were appeals to the Appellate Assistant Commis sioner against the assessments for the assessment years 1957 58 and 1958 59 and in these appeals	 the Appellate Assistant Commissioner held that the inclusion ' of 5 units constituting the Reserve Fund	 31/2 units constituting the Family Trust Expenses Account and the units allocated to the future husbands of the unmarried daughters in one single assessment was unjustified	 since the clauses constituting the Reserve Fund and the Family Trust Expenses Account and creating a trust in favour of the future sons in law consti tuted three distinct trusts and hence separate assessments must be made in respect of the several units forming the subject matter of these clauses. The Wealth Tax Officer accordingly made separate assessments on the assessees in respect of 5 units constituting the Research Fund and 31/2 units constituting the Family Trust Expenses Account for the assessment years 1957 58 and 1958 59 and similar assess ments were also made on the assessees in respect of the assessment years 1960 61 and 1961 62. We are not concerned in these appeals with the assessments made on the assessees in respect of 5 units constituting the Reserve Fund and 31/2 units constituting the Family Trust Expenses Account since these assessments have become final. The several beneficiaries specified in the Second Schedule also appealed against their assessments to wealth tax on the ground that each of them was entitled only to a life interest in the corpus of the units allocated to him or her and he or she could not	 therefore	 be assessed in respect of the entire value of the corpus. This contention was accepted by the Appellate Assistant Commissioner who held that inasmuch as each beneficiary was entitled only to the income of the Units allocated to him or her during his or her life time	 he or she could be assessed to wealth tax only on the value of his or her life interest 744 the respective units and not on the value of the corpus and in this view	 the Appellate Assistant Commissioner set aside the assessments made on the beneficiaries and directed the Wealth Tax Officer to make fresh assessments by includ ing only the value of the life interest of each of the beneficiaries in his or her assessment. The Wealth Tax Officer accordingly valued the life interest of each of the beneficiaries in the respective unit or units allocated to him or her and made assessment to wealth tax by including the value of such life interest. But the result of making assessments on this basis on the several beneficiaries was that the value of the 'remainder wealth ' in respect of 1661/2 units esCaped tax. The Wealth Tax Officer was of the view that the beneficiaries in respect of the several re mainder estates after the lives of the immediate benefici aries mentioned in the Second Schedule were unknown and their shares undeterminate and the assessees were	 there fore	 liable to be assessed in respect of the remainder wealth under section 21	 subsection (4) of the Wealth Tax Act. The Wealth Tax Officer accordingly reopened the assess ments made on the assessees for the assessment years 1957 58 to 1960 61 and made fresh assessments on the assessees in respect of the 'remainder wealth ' by applying the provisions of section 21	 sub section (4). He arrived at the value of the remainder wealth by taking the value of the entire original corpus and deducting therefrom the value of 5 units allocated to the Reserve Fund	 the value of 3 1/2 units allocated to the Family Trust Expenses Account and the aggregate of the values of the life interests assessed in the hands of the several beneficiaries. Similar assessment was also made on the assessees in respect of the remainder wealth for the assessment year 1961 62. The assessees appealed to the Appellate Assistant Com missioner against the assessments made on them in respect of the remainder wealth and in the appeals	 they contended that the Trust Deed created distinct and separate trusts for the benefit of the several beneficiaries mentioned in the Second Schedule and the Wealth Tax Officer was	 therefore	 not justified in clubbing the entire remainder wealth relat ing to these distinct and separate trusts in a single as sessment on the assessees and a further contention was also urged by them that	 in any event	 the assessments were bad in law inasmuch as the provisions of section 21	 sub section (4) were not applicable to the facts and circumstances of the case. The Appellate Assistant Commissioner agreed with the first contention of the assessees and held that though there was only one single Deed of Trust	 it created several distinct and separate trusts. one in favour of each benefi ciary mentioned in the Second Schedule with its own inde pendent and complete provision in regard to devolution after the death of such beneficiary and on this view	 the Appel late Assistant Commissioner annulled the assessments made on the assessees in respect of the remainder wealth	 leaving it open to the Wealth Tax Officer "to take such steps as he may consider necessary to assess the remainder wealth pertaining to each distinct trust separately". This view taken by the Appellate Assistant Commissioner rendered it unnecessary to decide the second contention as to the applicability of section 21	 sub section (4). The Revenue being aggrieved by the order passed by the Appellate Assistant Commissioner preferred appeals before the Tribunal on the 745 main ground that there was only one single trust created by the Trust Deed and not several distinct and separate trusts. Two further contentions were also sought to be urged on behalf of the Revenue at the hearing of the appeals and one of them was	 and that is the only contention material for our purpose	 that the Appellate Assistant Commissioner should have "given a definite finding regarding the applica bility of section 21	 sub section (4) or section 3 to the facts of the case". The argument of the Revenue in regard to this contention was that the assessees were liable to be assessed as an 'individual ' under section 3 in respect of the entire corpus of the trust fund and section 21	 sub section (4) being merely a machinery section did not have the effect of overriding the charge imposed on the assessees under section 3. The Tribunal allowed the Revenue to raise this new contention	 but made it clear that it would be only "for the purpose of supporting the assessments already made and not for the purpose of enhancing the assessments". The answer given by the assessees to this contention was that section 3 had no application at all	 because the assessees as trustees would be an "association of persons ' and under the Wealth Tax Act an 'association of persons ' is not an assessable entity and they went on further tO say that they could not be assessed even under sub section (1) or subsec tion (4) of section 21	 since in respect of the remainder estate after the death of each relative	 the beneficiaries were unknown. The asses.sees also contended that	 in any event	 even if section 3 were applicable	 the assessment on the assessee could be made only in accordance with the provisions of section 21	 since section 3 was subject to the other provisions of the Act including section 21. It was also urged on behalf of the assessees that the Trust Deed created distinct and separate trusts 'in respect of the several units allocated to the beneficiaries mentioned in the Second Schedule and in any event	 even if the trust was a single indivisible trust	 the remainder estate in respect of the several units was required to be assessed separately in the hands of the assessees and to the assessment of such remainder	 it was sub	section (1 ) of section 21 which applied and not sub section (4) of section 21. The Tribu nal	 on a proper construction of section 3 	and 21	 came to the Conclusion that these two sections have to be read together and so read it was clear that section 3 was subject to section 21 and the assessees could not	 therefore	 be assessed to wealth tax under section 3 in respect of the entire corpus	 ignoring the provisions of section 21. Sub section (1) of section 21 was	 in the view of the Tribunal	 not applicable and the only question	 therefore	 was whether assessment could be made on the assessees under sub	sec tion (4) of section 21. The Tribunal held that it was not correct to say that sub section (4) of section 21 was not applicable in the present case on the ground that the bene ficiaries in respect of the remainder estate were unknown and proceeded to apply the provisions of section 21	 sub section (4) in the assessment of the assessees. The Tribu nal accepted the contention of the Revenue that there was only one single trust created by the Trust Deed and not as many trust as there were beneficiaries	 but all the same it held	 on the application of section 21	 sub section (4) that "even if the Trust Deed be viewed as a single trust	 sepa rate assessments should be made on the trustees in respect of the several units allocated to the groups of the several beneficiaries mentioned in the Second Schedule". The result was that the appeals filed by the Revenue were dismissed. 746 The Revenue thereupon applied to the Tribunal for refer ring to the High Court certain questions of law said to arise out of the order of the Tribunal and on the applica tion of the Revenue	 the Tribunal referred the following questions for the decision of the High Court: "(i) Whether the Trustees are liable to be assessed under section 3 of the Wealth tax Act in the status of an individual ' ? (ii) Whether	 on the acts and in the circumstances of the case	 the Appellate Tribunal was right in holding that the provi sions of section 3 of the Wealth Tax Act should not be considered as subject to the provisions of section 21 of the above Act '? (iii) Whether	 on the facts and in the circumstances of the case	 the Appellate Tribunal was correct in refusing to admit the additional ground filed on behalf of the De partment (in W.T.A. No. 690 to 694 of 1963 64) except to the extent of supporting the assess ment as made ? (iv) Whether	 on a proper construction of the trust deed in question	 the Tribunal was correct in holding that the settlor had created only one trust in favour of several beneficiaries and not separate and independent trust in favour of several beneficiaries or groups of beneficiaries ? (v) Whether	 having held that a single trust was created by the trust deeds	 the Tribunal was correct in law in holding that under section 21 (4) of the Act the remainder wealth could be assessed in respect of each of the several units or groups of units allocated in favour of the beneficiaries specified under the relevant trust deeds ? (vi) Whether	 on the facts and in the circumstances of the case and on a proper construction of the provisions of section 21 of the Act	 the Tribunal was right in holding that the provisions of section 21 (4) are applicable in the circumstances of this case ?" So far as the first question is concerned	 the High Court answered it in favour of the Revenue by holding that the trustees are liable to be assessed as an 'individual ' under section 3	 because the word 'individual" in section 3 is wide enough to include a group of persons forming a unit. But section 3 being subject to the provisions of section 21	 the High Court held	 in answer to the second question	 that it was not permissible to the Revenue to tax the trustees under section 3 ignoring the provisions of section 21. The High Court held that the assessment on the trustees could be made only in accordance with the provisions of section 2 '1. The question then was as to which sub section of section 21 applied in the present case: sub section (1) or sub section (4). The High Court took the view that on the relevant valuation date	 ' it: was not possible to say that the bene ficiaries of the remainder estate in respect of each set of unit or units allocated to the respective relatives 747 Specified in the Second Schedule were unknown or their shares were indeterminate so as to attract the applicability of sub section (4) of section 21. The High Court.observed that it could be predicated with certainty and definiteness on the relevant valuation date as to who would succeed to the corpus of each set of unit or units and in what shares	 if the conditions for the vesting of the corpus were ful filled on that date. The High Court accordingly held that sub section (1) of section 21 was applicable to the facts of the case and the assessment on the assessees was liable to be made in conformity with that provision. The High Court then addressed itself to the fourth question and held that the Tribunal was not right in holding that the Trust Deed created one single indivisible trust but there were really several distinct and separate trusts created by the Trust Deed in favour of each of the relatives mentioned in the Second Schedule. This view taken by the High Court neces sarily resulted in questions Nos. (v) and (vi) being an swered in favour of the assessees. That left the third question	 but so far as that is concerned	 the High Court took the view that it was not necessary to consider it in view of the answers given to the other questions. It is this decision of the High Court on the various questions referred by the Tribunal which is impugned in the present appeals preferred by special leave. Before we take up the questions of law that arise for consideration in these appeals	 we may clear the ground at the outset by pointing out that though before the High Court	 it was contended on behalf of the assessees that they were not liable to be assessed to wealth under section 3 since unlike the charging section in the Income tax Act 3 did not provide for levy of wealth tax on association of persons his contention was not pressed before us and it was conceded	 and in our opinion rightly	 that the assessees constituted an assessable unit and opinion liable to be assessed to wealth tax as 'individual ' under section 3. This position indeed could not be disputed after the decision of this Court in Trustees of Gordhandas Govindram Family Chari ty Trust vs Commissioner of Income Tax	 Bombay. (1) But the question is whether assessment could be made on the asses sees under section 3 apart from and without reference to section 21. That depends on the true meaning and effect of sections 3 and 21 and the inter relation between these two sections. SectiOn 3 is the charging section and it levies the charge of Wealth tax on the net wealth of the assessee on the relevant valuation date. 'Net wealth ' is defined in section 2 (m) to mean "the amount by which the aggregate value computed in accordance with the provisions of this Act of all the assets	 wherever located	 belonging to the asses see on the valuation date is in excess of the.aggregate value of all the debts owed by the assessee on the valuation date ". It is clear from this definition that any property	 wherever located	 'belonging to ' the assessee on the relevant valuation date would be includible in the net wealth of the assessee assessable to wealth tax. One argu ment based on semantics advanced on behalf of the assessees was that assets held by a trustee in trust for others cannot be said to be assets belonging to the	 trustee so as to be includible in his net wealth. The assets so held "are not trustee 's property in any real sense": they are (1) 748 the property of the beneficiaries and	 to use the words of Lord Mac Naughton in Heritable Reversionary Co. Ltd. vs Millar	 (1) the beneficiaries are the true owners all along. The trustee of a trust cannot	 therefore	 be assessed to wealth tax in respect of the trust properties under section 3. It was for this reason	 contended the assessees	 that special provision had to be made in section 21 for assessing the trustee and hence assessment on the trustee could be made only in accordance With such special provision. This was precisely the argument which found favour with the Gujarat High Court in Commissioner of Wealth Tax	 Gujarat vs Kum. Manna G. Sarabhai(2) which was a case decided by a Division Bench presided over by one of us (Bhagwati	 J. as the Chief Justice). On this argument	 the trustee of a trust would not be liable to be assessed to wealth tax in respect of the trust properties under section 3. It is only by reason of section 21 that he would be assessable and hence assessment cannot be made on him except in accordance with the provisions of section 21. Prima facie	 there seems to be force in this argument	 but we do not think it neces sary to express any final opinion upon it	 since there is an alternative argument advanced on behalf of the assessees which is quite substantial and leave no room for judicial doubt or hesitation. Let us assume that the trustee of a trust would be assessable in respect of the trust properties under section 3	 even in the absence of section 21. But section 3 imposes the charge of wealth tax 'subject to the other provisions ' of the Act and these other provisions include section 21. Section 3 is	 therefore	 made expressly subject to section 21 and it must yield to that section in so far as the latter makes special provision for assessment of a trustee of a trust. Section 21 is mandatory in its terms and as it stood at the material time it provided as follows: "21(1) In the case of assets chargeable to tax under this Act which are held by a court of wards or an administrator general or an official trustee or any receiver or manager or any other person	 by whatever name called	 appointed under any order of a court to manage property on behalf of another	 or any trustee appointed under a trust declared by a duly executed instrument in writing	 whether testa mentary or otherwise (including a trustee under a valid deed of wakf)	 the wealth tax shall be levied upon and recoverable from the court of wards	 administrator general	 official trustee	 receiver	 manager or trus tee	 as the case may be	 in the like manner and to the same extent as it would be leviable upon and recoverable from the person on whose behalf the assets are held	 and the provisions of the Act shall apply accordingly. (2) Nothing contained in sub section (1) shall prevent either the direct assessment of the person on whose behalf the assets above referred to are held	 or the recovery from such person of the tax payable in respect of such assets. (1) (2) 749 (3) Where the guardian or trustee of any person being a minor	 lunatic or idiot (all of which persons are hereinafter in this sub section included in the term "beneficiary") holds any assets on behalf of such benefici ary	 the tax under this Act shall be levied upon and recoverable from such guardian or trustee	 as the case may be	 in the like manner and to the same extent as it would be leviable upon and recoverable from any such beneficiary if of full age or sound mind and in direct ownership of such assets. (4) Notwithstanding anything contained in this section	 where the shares of the persons on whose behalf or for whose benefit any such assets are held are indeterminate or unknown	 the wealth tax shall be levied upon and recovered from the court of wards	 administrator general	 official trustee	 receiver	 manager	 or other person aforesaid as if the persons on whose behalf or for whose benefit the assets are held were an individual for the purposes of this Act. " Sub section (5) was not a part of section 21 at the material time since it was introduced only with effect from 1st April	 1965 but it throws some light on the interpretation of the other sub sections of section 21 and hence it may be reproduced here: "21(5) Any person who pays any sum by virtue of the provisions of this section in respect of the net wealth of any beneficiary	 shall be entitled to recover the sum so paid from such beneficiary	 and may hold on behalf or for the benefit of such beneficiary	 an amount equal to the sum so paid. " It would	 therefore	 be clear on a combined reading of sections 3 and 21 that whenever assessment is made on a trustee	 it must be made in accordance with the provisions of section 21. Every case of assessment on a trustee must necessarily fall under section 21 and he cannot be assessed apart from and without reference to the provisions of that section. To take a contrary view giving option to the Revenue 'to assess the trustee under section 3 without following the provi sions of section 21 would be to refuse to give effect to the words "subject to the other provisions of this Act ' in section 3	 to ignore the maxim genralia specialibus non derogent and to deny mandatory force and effect to the provisions enacted in section 2|. It may be noted that	 while interpreting the corresponding provisions in section 41 of the Indian Income Tax Act	 1922 and section 161 of the Income Tax Act	 1961 	 this Court in C.R. Nagappa vs Commissioner of IncomeTax(1) approved the following observa tions made by Chagla	 C.J. in regard to the scheme of section 41 of the Indian Income Tax Act	 19v22 in Commissioner of Income tax	 Ahmedabad vs Balwantrai Jethalal Vaidya(2): "If the assessment is upon a trustee	 the tax as to be levied and recovered in the manner provided in section 41. (1) (2) 750 The only option that the Legislature gives is the option embodied in sub section (2) of section 41	 and that option is that the de partment may assess	 the beneficiaries instead of the trustees	 or having assessed the trus tees it may proceed to recover the tax from the beneficiaries. But on principle the contention of the department cannot be accept ed that	 when a trustee is being assessed to tax	 his burden which will ultimately fall upon the beneficiaries should be increased and whether that burden should be increased or not should be left to the option of the depart ment. The basic idea underlying section 41	 and which is in conformity with principle	 is that the liability of the trustees should be co extensive with that of the beneficiaries and in no sense a wider or a larger liability. Therefore	 it is clear that every case of an asessment against a trustee must fall under section 41	 and it is equally clear that	 even though a trustee is being assessed	 the as sessment must proceed in the manner laid down in Chapter III. Section 41 only comes into play after the income has been computed in accordance with Chapter III. Then the ques tion of payment of tax arises and it is at that stage that section 41 issues a mandate to the taxing department that	 when they are dealing with the income of a trustee	 they must levy the tax and recover it in the manner laid down in section 41." (Emphasis supplied by us). This Court also observed that "the some considerations must apply in the interpretation of section 161 (2) of the Income Tax Act	 1961". The same view	 it may be pointed out	 was taken by this Court in an earlier decision in Commissioner of Income Tax vs Nandial Agarwal.(1) These decisions given under the Income Tax law must apply equally in the interpre tation of section 21	 since the relevant provisions of both the statutes are almost identical. That was pointed out by this Court in Commissioner of Wealth Tax	 Bihar & Orissa vs Kripashankar Dayashanker Worah(2) where it was said: "Section 21(1) of the Act is analogous to section 41 of the Income Tax Act	 1922. The only difference between the two sections is that whereas the former deals with assets	 the latter deals with income. Subject to this difference	 the two provisions are identically worded. Hence	 the decisions rendered under section 41 (1) of the Indian Income tax Act	 1922	 have a bearing on the question arising for decision in this case". It must therefore	 be held to be incontroverti ble that whenever a trustee is sought to be assessed	 the assessment must be made in accordance with the provisions of section 21. It must also be noted that the assessment which is contem plated to be made on the trustee under sub section (1) or sub section (4) of section 21 is assessment in a representa tive capacity. It is really the beneficiaries who are sought to be assessed in respect of their interest in the trust properties through the trustee. Sub section (1) provides that in respect of trust properties held by a trustee	 wealth tax (1) at 762. (2) 751 shall be levied upon him 'in the like manner and to the same extent ' as it would be leviable on the beneficiary for whose benefit the trust properties are held. This provision obviously can apply only where the trust properties are held by the trustee for the benefit of a single beneficiary or. where there are more beneficiaries than one	 the individual shares of the beneficiaries in the trust properties are determinate and known. Where such is the case	 wealth tax can be levied on the trustee in respect of the interest of any particular beneficiary in the trust properties 'in the same manner and to the same extent ' as it would be leviable upon the beneficiary and in respect of such interest in the trust properties	 the trustee would be assessed in a repre sentative capacity as representing the beneficiary. This	 of course	 does not mean that the Revenue cannot proceed to make direct assessment on the beneficiary. in respect of the interest in the trust properties which 'belongs to ' him. The beneficiary would always be assessable in respect of his interest in the trust properties	 since such interest 'belongs to ' him and the right of the Revenue to make direct assessment on him in respect of such interest stands unim paired by the provision enabling assessment to be made on the trustee in a representative capacity. Sub section (2) makes this clear provided that nothing contained in sub section (1) shall prevent either the direct assessment of the beneficiary for whose benefit the trust properties are held or the recovery from the beneficiary of the wealth tax in respect of his interest in the trust properties which is assessed in the hands of the trustee. The Revenue has thus two modes of assessment available for assessing the interest of a beneficiary in the trust properties: it may either assess such interest in the hands of the trustee in a representative capacity under sub section (1) or assess it directly in the hands of the beneficiary by in cluding it in the net wealth of the beneficiary. What is important to note is that in either case what is taxed is the interest of the beneficiary in the trust properties and not the corpus of the trust properties. So also where beneficiaries are more than one	 and their shares are inde terminates or unknown	 the trustees would be assessable in respect of their total beneficial interest in the trust properties. Obviously in such a case. it is not possible to make direct assessment on the beneficiaries respect of their interest in the trust properties	 because their shares are indeterminate or unknown and that is why it is provided that the assessment may be made on the trustee as if the benefi ciaries for whose benefit the trust properties are held were on individual. The beneficial interest is treated as if it belonged to one individual beneficiary and assessment is made on the trustees in the same manner and to the same extent as it would be on such fictional beneficiary. It will therefore	 be seen that in this case too	 it is the beneficial interest which is assessed to wealth tax in the hands of the trustee and not the corpus of the trust proper ties. This position becomes abundantly clear if we look at sub section (5) which clearly postulates that where a trus tee is ' assessed under sub section (1) or sub section (4)	 the assessment is made on him 'in respect of the net wealth ' of the beneficiary	 that is	 the beneficial interest belong ing to him. Now wherever there is a trust	 it is obvious there must be beneficiaries under the trust because the very concept of a trust connotes that though the legal title vests in the trustee	 he does not own or hold the trust pro 752 perties for his personal benefit but he holds the same for the benefit of others	 whether individuals or purposes. It must follow inevitably from this premise	 that since under sub section (1) and (4) of section 21 it is the beneficial interests which are taxable in the hands of the trustee in a representative capacity and the liability of the trustee cannot be greater than the aggregate liability of the bene ficiaries no part of the corpus of the trust properties can be assessed in the hands of the trustee under section 3 and any such assessment would be contrary to the plain mandatory provisions of section 21. It is also necessary to notice the consequences that seem to flow from the preposition laid down in section 21	 sub section (1) that the trustee is assessable 'in the like manner and to the same extent ' as the beneficiary. The consequences are three fold. In the first place it follows inevitably from this proposition that there would have to be as many assessments on the trustee as there are benefici aries with determinate and known shares	 though for the sake of convenience	 there may be only one assessment order specifying separately the tax due in respect of the wealth of each beneficiary. Secondly	 the assessment of the trustee would have to be made in the same status as that of the beneficiary whose interest is sought to be taxed in the hands of the trustee. This was recognised and laid down by this Court in N.V. Shanmugham & Co. vs Commissioner of Income Tax Madras (1) And lastly	 the amount of tax payable by the trustee would be the same as that payable by each beneficiary in respect of his beneficial interest	 if he were assessed directly. Vide Padmavati Jayakrishna Trust vs CommiSsioner of Wealth Tax	 Gujarat(2) Trustees of Putlibai R.F. Mulla Trust vs Commissioner of Wealth Tax.(3) and Chintamani Ghosh vs Commissioner of Wealth Tax.(4) Let us	 by way of illustration	 take a case where property of the value of Rs. ten lacs is held in trust under which the income of the property is given to A for life and on his death	 the property is to be divided equally between B and C. The beneficiaries in this case are clearly A	 B and C	 A having life interest in the trust property and B and C having equal shares in the remainder. The Revenue has option to assess the beneficial interests of A	 B and C in the trust property in the hands of the trustee or to make direct assessment on each of the three beneficiaries. If the trustee is assessed under sub section (1) of section 21	 three separate assessments would have to be made on him	 one in respect of the acturial valuation of the life interest of A	 which ' may be	 to take an ad hoc figure	 say	 Rs. 5 lacs and the other two in respect of the acturial valuations of the remaindermen 's interests of B and C	 which may be	 to take again an ad hoc figure	 say	 Rs. 2 lacs each. But	 as pointed out above	 the Revenue may	 instead of assessing the trustee	 proceed to make direct assessment on each of the three beneficiaries A	 B and C and in that case	 Rs. 5 lacs	 Rs. 2 lacs and Rs. 2 lacs would be included in the net wealth of A	 (1) (2) ; at 73 4. (3) 	 at 657 8 (4) at 341. 753 B and C respectively. The result would be that though the value of the corpus of the trust property is Rs. 10 lacs	 the assessments	 whether made on the trustee or on each of the three beneficiaries	 Would be only in respect of Rs. 5 lacs	 Rs. 2 lacs and Rs. 2 lacs and the balance of Rs. 1 lac would not be subject to taxation. In fact in most cases	 if not all	 the aggregate of the values of the life interest and the remaindermen 's interest would be less than the value of the total corpus of the trust property	 since the value of the remaindermen 's interest would be the present value of his right to receive the corpus of the trust property at an uncertain future date and this would almost invariably be less than the value of the corpus of the trust property after deducting the value of the preceding life interest. The balance of the value of the corpus of the trust proper ty would not	 in the result	 be subjected to assessment to wealth tax. But that is the logical and inevitable effect of the schemes of section 21. Once it is established that a trustee of a trust can be assessed only in accordance with the provisions of section 21 and under these provisions	 it is only the beneficial interests which are taxed in the hands of the trustee	 it must follow as a necessary corol lary that no part of the value of the corpus in excess of the aggregate value of the beneficial interests can be brought to tax in the assessment of the trustee. To do so would be contrary to the scheme and provisions of section 21. It would be clearly erroneous to assess the trustee to wealth tax on the excess of the value of the corpus over the acturial valuations of the life interest and the reversion ary interest of the beneficiaries. We find that the same view has been taken by the Gujarat High Court in Commission er of Wealth Tax	 Gujarat vs Smt. Arundhati Balkrishna Trust(1) and this view	 in our opinion	 represents the correct law on the subject. We have given in the preceding paragraph illustration of a case falling within section 21	 sub section (1)	 but the illustration can be slightly modified by taking a case where property is held in trust for giving income for life to A and on his death	 to such of the children of A as the trustee might think fit. Section 21	 sub section (4) would be clearly attracted in such a case so far as the reversion ary interest is concerned	 because	 on the relevant valua tion date	 the remaindermen and their shares would be inde terminate and unknown. But here also two assessments would have to be made on the trustee: one in respect of the actu rial valuation of the life interest of A under sub section (1) of section 21 and the other in respect of the acturial valuation of the totality of the beneficial interest in the remainder as if it belonged to one individual under sub section (4) of section 21. The difference between the value of the corpus of the trust property and the aggregate of the acturial valuations of the life interest of A and the re maindermen 's interest would not be assessable in the hands of the trustee because	 as pointed out above	 the trustee can be taxed only in respect of the beneficial interests and there being no other beneficiary apart from A and such of the children of A as the trustee might think fit	 the bal ance of the value of the corpus cannot (1) 754 be brought to tax in the hands of the trustee under sub section (1) or (4) of section 21. It is	 therefore	 obvious that no part of the corpus of the trust funds could be assessed in the hands of the asses sees	 but the assessment could be made on the assessees only in respect of the beneficial interests of the beneficiaries in the trust funds under sub section (1) and (4) of section 21. Now so far as the beneficiaries specified in the Second Schedule are concerned	 each of them had a life interest in the unit or units allocated to him or her and the assessees. were liable under sub section (1) of section 21 to. be assessed in respect of such life interest 'in the same manner and to the same extent ' as the respective benefici aries. But the question is as to how the beneficial inter est in the remainder in respect of each set of unit or units was liable to be taxed in the hands of the assessees. The argument of the Revenue wag that it could not be said on the relevant valuation date as to who would be the beneficiaries entitled to the remainder on the death of the concerned relative and hence the beneficiaries were indeterminate and unknown on the relevant valuation date and in the circum stances	 sub section (1) of section 21 had no application. Sub section (4) of section 21 was also not attracted	 said the Revenue	 because that sub section could apply only where the shares of the beneficiaries were indeterminate or un known and not where the beneficiaries themselves were inde terminate and unknown. The Revenue contended	 on the basis of this argument	 that since the beneficial interest in the remainder in respect of each set of unit or units was not taxable either under sub section (1) or sub section (4) or section 21	 the assessees were liable to be assessed in respect of the value of the corpus of such unit or units minus the valuation of the life interest under section 3. But this contention is plainly erroneous	 because	 on the view we have taken as regards the interpretation of section 3 and 21	 a trustee can be assessed to wealth tax only in respect of the beneficial interests of the beneficiaries and no assessment can be made on him in respect of any part of the corpus of the trust funds apart from and without reference to section 21. We shall presently show that under the Trust Deed on each relevant valuation date the shares of the beneficiaries in the remainder in respect of each set of unit or units were determinate and known and the case was	 therefore	 governed by sub section (1) of section 21	 but we may point out that even if the beneficiaries were indetermi nate or unknown	 sub section (4) of section 21 would apply and the assessee would be liable to the assessed in respect of the totality of the beneficial interest in the remainder as if it belonged to one single beneficiary. When the beneficiaries are indeterminate or unknown	 then obviously their shares would also be indeterminate and unknown. We cannot conceive of a case where the shares would be determi nate or known while the beneficiaries are indeterminate and unknown. The expression 'where the shares of the benefici aries are indeterminate or unknown ' carried with it by necessary implication	 a situation where the beneficiaries themselves are indeterminate or unknown. Such	 for example	 would be the case in the modified illustration given above. There. the beneficiaries are such of the children of A as the trustee might think fit 755 and the beneficiaries themselves would	 therefore	 be inde terminate and unknown and yet sub section (4) of section 21 would apply to their case. To take any other view would be to deny full meaning and effect to the words "where the shares of the beneficiaries are indeterminate or unknown" and to create a lacuna where	 even though the beneficial interest in the remainder is disposed of under the Trust Deed	 such beneficial interest would escape assessment. The correct interpretation of sub section (4) of section 21 must	 therefore	 be that even where the beneficiaries of the remainder are indeterminate or unknown	 the trustee can be assessed to wealth tax in respect of the totality of the beneficial interest in the remainder	 treating the benefici aries fictionally as an individual. This immediately takes us to the question as to which of the two sub sections	 (1) or (4) of section 21 applies for the purpose of assessing the assessees to wealth tax in respect of the beneficial interest in the remainder qua each set of unit or units allocated to the relatives specified in the Second Schedule. Now it is clear from the language of section 3 that the charge of wealth tax is in respect of the net wealth on the relevant valuation date	 and	 therefore	 the question in regard to the applicability of sub sec tion (1) or (4) of section 21 has to be determined with reference to the relevant valuation date. The Wealth Tax Officer has to determine who are the beneficiaries in re spect of the remainder on the relevant date and whether their shares are indeterminate or unknown. It is not at all relevant whether the beneficiaries may change in subsequent years before the date of distribution	 depending upon con tingencies which may come to pass in future. So long as it is possible to say on the relevant valuation date that the beneficiaries are known and their shares are determi nate	the possibility that the beneficiaries may change by reason of subsequent events such as birth or death would not take the case out of the ambit of sub section (1) of sec tion. It is no answer to the applicability of sub section (1) of section 21 to say that the beneficiaries are indeterminate; and unknown because it cannot be predicated who would be the beneficiaries in respect of the remainder on the death of the owner of the life interest. The posi tion has to be seen on the relevant valuation date as if the preceding life interest had come to an end on that date and if	 on that hypothesis	 it is possible to determine who precisely would be the beneficiaries and on what determinate shares	 sub section (1) of section 21 must apply and it would be a matter of no consequence that the number of beneficiaries may vary in the future either by reason of some beneficiaries ceasing to exist or some new benefici aries coming into being. Not only does this appear to us to be the correct approach in the application of subsection (1) of section 21	 but we find that this has also been the general concensus of judicial opinion in this country in various High Courts during the last about thirty years. The first decision in which this view was taken was rendered as far back as 1945 by the Patna High Court in Khan Bahadur M. Habibur Rahman vs Commissioner of Income Tax	 Bihar & Orissa(1) and since then	 this view has been followed by the Calcutta High Court in Subhashini Karuri vs Wealth (1) 9 707SCI/77 756 Tax Officer Calcutta(1) the Bombay High Court in Trustees of Putlibai R.F. Mulla Trust vs Commissioner of Wealth Tax (supra) and Commissioner of Wealth Tax	 Bombay vs Trustees of Mrs. Hansabai. Tribhuwandas Trust(2) and the Gujarat High Court in Padmavati Jaykrishna Trust vs Commissioner of Income Tax	 Gujarat (supra). The Calcutta High Court point ed out in Subhashini Karuri 's case: "The share of a benefi ciary can be said to be indeterminate if at the relevant time the share cannot be determined but merely because the number of beneficiaries vary from time to time	 one cannot say that it is ideterminate". The same proposition was formulated in slightly different language by the Bombay High Court in Trustees of Putlibai R.F. Mulla Trust 's case: "The question whether the shares of the beneficiaries are deter minate or known has to be judged as on the relevant date in each respective year of taxation. Therefore	 whatever may be the position as to any future date	 so far as the rele vant date in each year is concerned	 it is upon 'the terms of the trust deed always possible to determine who are the shares and what their shares respectively are. " The Gujarat High Court also observed in Padmavati Jaykrishna Trust 's case: " . in order to ascertain whether the shares of beneficiaries and their numbers were determinate or not	 the Wealth Tax Officer has to ascertain the facts as they prevailed on the relevant date and therefore any varia tion in the number of beneficiaries in future would not matter and would not make sub section (4) of section 21 applicable." These observations represent correct state ment of the law and we have no doubt that in order to deter mine the applicability of sub section (1) of section 21	 what has to be seen is whether on the relevant valuation date	 it is possible to say with certainty and definiteness as to who would be the beneficiaries and whether their shares would be determinate and specific	 if the event on the happening of which the distribution is to take place occurred on that date. If it is	 sub section (1) of sec tion 21 would apply: if not	 the case will be governed by sub section (4) of section 21. Now in the resent case it is clear from the provisions of the Trust Deed that	 in the case of each set of unit or units	 it is possible to say with certainty and definiteness on each relevant valuation date as to who would be the beneficiaries and in 'what specific shares	 if the respec tive relative mentioned in the Second Schedule to whom such set of unit or units is allocated under the Trust Deed were to die on that date. That is the view taken 	by the High Court in the judgment impugned in these appeals and we think it is a correct view on the interpretation of the provisions of the Trust Deed. We may point out in fairness to the learned counsel appearing on behalf of the Revenue that he did not seriously contest this position. There is not a single contingency unprovided for in the Trust Deed and whenever a relative specified in the Second Schedule	 who is the owner of life interest in the set of unit or units allocated to him or her dies	 there would always be beneficiaries capable of being easily ascertained and identified who would be entitled to the corpus of such unit or units in determinate and specific shares	 either immedi ately on the (1) (2) 757 death of such life tenant or after another life interest. The remainder in respect of each set of unit or units allo cated to the respective relative specified in the Second Schedule was	 therefore	 liable to be assessed in the hands of the assessees under section 21	 sub section (1) in the same manner and to the same extent ' as each beneficiary in respect of his determinate and known share in such re mainder. That plainly excluded the applicability of sub section (4) of section 21 in the assessment of the remain der. The High Court also examined the question whether the Trust Deed created one single indivisible trust or several distinct and separate trusts and	 disagreeing with the view taken by the Tribunal	 came to the conclusion that "the Deed of Trust created several trusts in favour of the relatives specified in the Second Schedule and their issues. " But.on the view taken by us that it is sub section (1) of section 21 and not sub section (4) of that section which applies in the assessment of the remainder in respect of each set of unit or units in the hands of the assessees	 it is unneces sary to pursue this question and decide whether the Trust Deed created one single indivisible trust or as many trusts as the number of beneficiaries specified in the Second Schedule. We accordingly agree with the High Court that question No. (i) should be answered in favour of the Revenue and Question Nos. (ii)	 (v) and (vi) should be answered in favour of the assessees. We do not propose to answer Ques tions Nos. (iii) and (iv)	 since in view of the answers given by us to the other questions	 it is unnecessary to decide them. The appeals are accordingly dismissed. The Commissioner will pay the costs of these appeals to the assessees in one set. P.B.R. Appeals dismissed.

Section 21(1) of the Wealth Tax Act provides that in case of assets chargeable to tax under the Act which are held by . . any trustee appointed under a Trust	 wealth tax shall be levied upon and recoverable from the trustee in the like manner and to the same extent as it would be leviable upon and recoverable from the person on whose behalf the assets are held. Sub section (4) provides that notwithstanding anything contained in this section	 where the shares of the persons on whose behalf or for whose benefit any such assets are held are indeterminate or un known	 wealth tax shall be levied upon and recovered from the trustee as if the persons on whose behalf or for whose benefit the assets are held were an individual for the purposes of this Act. The corpus of a family trust created by the Nizam of Hyderabad was notionally divided into 175 equal units	 out of which 1611/2 units were allocated amongst relatives mentioned in the Second Schedule to the Deed in the manner specified therein. The essence of the Trust was that none of the beneficiaries was entitled to the corpus of the units allocated to him or her but was only entitled to be paid the income from the units allocated to him or her. The trust deed made detailed and elaborate provisions as to the dispo sition of the different units allocated to the various beneficiaries and also provided for every other contingency in such a manner that at any particular point of time one could say	 if the owner of the life interest were to die at that point of time	 who the beneficiaries entitled to the corpus would be. The Wealth Tax Officer assessed wealth tax on the value of the respective units allocated to each of the several beneficiaries. In appeal the Appellate Assistant Commissioner upheld the assessees ' contention that since each of them was enti tled only to a life interest in the corpus of the units allocated	 they could not be assessed in respect of the entire value of the corpus. When assessments were made on this basis	 the value of the remainder wealth escaped tax. The Wealth Tax Officer	 therefore	 assessed the remainder wealth under section 21(4) taking the view that the beneficiaries in respect of the several remainder estates after the lives of the immediate beneficiaries were unknown and their shares were indeterminate. On appeal the appellate Assistant Commissioner	 without	 deciding the contention as to the applicability of section 21(4)	 annulled the assessments on the ground that though the trust deed was one	 it created several distinct and separate trusts	 one in favour of each beneficiary with its own independent and complete provision in regard to devolution. after the death of each beneficiary and the Wealth Tax Officer was not justified in clubbing the entire remainder wealth in a single assessment. Before the Appellate Tribunal the. Revenue contended that the assessees were liable to be assessed as an individ ual under section 3 in respect of the entire corpus of the trust fund and section 21(4) being merely a machinery provision did not have the effect of overriding the charge imposed under section 3. 736 The Tribunal held (i) that 8. 3 was subject to section 21 and the assessees could not be assessed to wealth tax under that section in respect of the entire corpus ignoring the provisions of section 21; (ii) that section 21(1) was not applicable in this case and (iii) that section 21(4) was applicable because the beneficiaries in respect of the remainder estate were unknown. The following questions	 among others	 were referred by the Tribunal the High Court: 1. Whether the trustees were liable to be taxed under section 3 in the status of an "individual"? 2. Whether the Tribunal was right in hold ing that the provisions of section 3 should be considered as subject to the provisions of section 21 ? 3. Whether the Tribunal was correct in holding that under section 21(4) the remainder wealth could be assessed in respect of each of the several units or groups of units allocated in favour of the beneficiaries ? 4. Whether the Tribunal was right in holding that the provisions of section 21(4) are applica ble? The High Court held that (i) since the terms "individu al" occurring in section 3 is wide enough to include a group of persons forming a unit	 the trustees were liable to be assessed under section 3 but	 section 3 being subject to the provi sions of section 21	 it was not permissible to tax the trustees under s 3 ignoring the provisions of section 21; (ii) it was not possible to say	 on the valuation date	 that the benefici aries of the remainder estate in respect of each unit were unknown or their shares were indeterminate so as to attract the applicability of section 21(4); and (iii) section 21(1) was ap plicable because it could be predicated with certainty and definiteness on the relevant valuation date as to who would succeed to the corpus of each set of unit and in what shares	 if the conditions for the vesting of the corpus who fulfilled on that date. Dismissing the appeals in part	 HELD: The trustees constituted an assessable unit and were liable to be assessed to wealth tax as "individual" under section 3. [747 E] (1)(a) Section 3 imposes the charge of wealth tax sub ject to other provisions of the Act and these other provi sions include section 21. Section 3 is	 therefore	 made express ly subject to section 21 and it must yield to that section in so far as the latter makes special provision for assessment of a trustee. [748 D E] (b) Section 21 is mandatory On a combined reading of ss 3 and 21	it is clear that an assessment on a trustee must be made in accordance with the provisions of s 21 Every case of assessment on a trustee must necessarily fall under section 21 and he cannot be assessed apart from and without reference to that section. To hold otherwise would be to refuse to give effect to the words "subject to the other provisions of this Act" in section 3 and to deny mandatory force and effect to the provisions of section 21. [749 E G] C.R. Nagappa vs Commissioner of Income tax 	 Commissioner of Income Tax vs Nandial Agarwal at 762 and Commissioner of Wealth Tax	 Bihar & Orissa vs Kripashankar Dayashanker Worah followed. Commissioner of Income Tax	 Ahmedabad vs Balwantrai Jetha lal Vaidya approved. (c) The assessment which is contemplated to be made on the trustee under section 21(1) or section 21(4) is assessment in a representative capacity. It is really the beneficiaries who are sought to be assessed in respect of their interest in the trust properties through the trustee. Section 21(1) can apply only where the trust properties are held by the trus tee for the benefit of a single beneficiary 737 or where there are more beneficiaries than one	 the individ ual shares of the benenciaries in the trust properties are determinate and known. Where such is the case wealth tax can be levied on the trustee in respect of the interest of any particular beneficiary in the trust properties in the same manner and to the same extent as it would be leviable upon the beneficiary and in respect of such interest in the trust properties	 the trustees would be assessed in a repre sentative capacity as representing the beneficiary. The beneficiary would always be assessable in respect of his interest in the trust properties since such interest belongs to him and the right of the Revenue to make direct asesss ment on him in respect of such interest stands unimpaired by the provisions enabling assessment to be made on the trus tees in a representative capacity. [750 G H	 751 A B	 C] (d) The Revenue has thus two modes of assessment: (a) it may either assess such interest in the hands of the trustee in a representative capacity under sub section (1); or (b) assess it directly in the hands of the beneficiary by in cluding it in the net wealth of the beneficiary. In either case what is taxed is the interest of the beneficiary in the trust properties and not the corpus of the trust properties. So also where beneficiaries are more than one and their shares are indeterminate or unknown	 the trustee would be assessable in respect of their total beneficial interest in the trust properties. In the instant case it is the beneficial interest which is assessed to wealth tax in the hands of the trustee and not the corpus of the trust properties. Since under sub sections (1) and (4) of section 21 it is the beneficial interest which is taxable in the hands of the trustee in a representative capacity and the liability of the trustee cannot be greater than the aggregate liability of the beneficiaries	 no part of the corpus of the trust properties can be assessed in the hands of the trustee under section 3 and any such assessment would be contrary to the plain mandatory provisions of section 21. [751 D E	 G H] (e) The consequences that flow from the proposition laid down in section 21(1) that the trustee is assessable "in the like manner and to the same extent" as the beneficiary	 are: (i) There would have to be as many assessments on the trustee as there are beneficiaries with determinate and known shares	 though for the sake of convenience	 there may be only one assessment order specifying separately the tax due in re spect of the wealth of each beneficiary; (ii) The assessment of the trustee would have to be made in the same status as that of the beneficiary whose interest is sought to be taxed in the hand of the trustee; and (iii) The amount of tax payable by the trustee would be the same as that payable by each beneficiary in respect of his beneficial interest	 if he were assessed directly. [752 B D] N.V. Shanmugham & Co.	 vs Commissioner of Income Tax	 Madras	 	 Padmavati Jaykrishna Trust vs Commissioner of Wealth Tax	 Gujarat 	 at 73 4	 Trustee of Putlibai R.F. Mulla Trust vs Commissioner of Wealth Tax 	 at 657 8 and Chintamani Ghosh vs Commissioner of Wealth Tax at 341 referred to. (f) Once it is established that a trustee can be assessed only in accordance with the provisions of section 21 and under these provisions	 it iS only the beneficial interests which are taxed in the hands of the trustee	 it must follow that no part of the value of the corpus in excess of the aggre gate value of the beneficial interests can be brought to tax in the assessment of the trustee. To do so would be con trary to the scheme and provisions of section 21. It would be deafly erroneous to assess the trustee t.o wealth tax on the excess of the value the corpus over the actuarial valuations of the life interest and the reversionary interest of the beneficiaries. [753 C D] Commissioner of Wealth Tax	 Gujarat vs Smt. Arundhati Balkrishna Trust approved. (g) No part of the corpus of the trust funds could be assessed in the hands of the trustees but the assessment could be made on them only in respect of the beneficial interests of the beneficiaries in the trust funds under sections 21 (1) and (4). [754 A] 738 (2)(a) Even if the beneficiaries were indeterminate or unknown	 section 21(4) would apply and the trustees would be liable to be assessed in respect of the totality of the beneficial interest in the remainder as if it belonged to one single beneficiary. The expression 'where the shares of the beneficiaries are indeterminate or unknown ' carries with it by necessary implication a situation where the benefici aries themselves are indeterminate or unknown. [754 F G] (b) The correct interpretation of section 21(4) must be that even where the beneficiaries of the remainder are indetermi nate or unknown	 the trustees can be assessed to wealth tax in respect of the totality of the beneficial interest in the remainder	 treating the beneficiaries fictionally as an individual. [755 B] (c) The Wealth Tax Officer has to determine as to who the beneficiaries are in respect of the remainder on the relevant date and whether their shares are determinate and known. So long as it is possible to say on the relevant valuation date that the beneficiaries are known and their shares are determinate	 the possibility that 'the benefici aries may change by reason of subsequent events such as birth or death would not take the case out of the ambit of section 21(1)	 [755 D El Khan Bahadur M. Habibur Rehman vs Commissioner of Income Tax	 Bihar & Orissa Subashini Karuri vs Wealth Tax Officer	 Calcutta 	 Commissioner of Wealth Tax	 Bombay vs Trustees of Mrs. Hansabai Tribhu wandas Trust and Padmawati Jaykrishna Trust vs Commissioner of Wealth Tax	 Gujarat 	 at 73 4 approved. (d) In order to determine the applicability of section 21(1) on the relevant valuation date	 it has to be seen whether it is possible to say with certainty and definiteness as to who would be the beneficiaries and whether their shares would be determinate and specific	 if the event on the happening of which the distribution is to take place occurred on that date. If it is	 section 21(1) would apply	 if not	 the case will be governed by section 21(4). In the instant case the trust deed provided for every contingency and whenever a relative specified in Second Schedule	 who is the owner of the life interest in the set of unit or units allocated to him or her dies	 there would always be beneficiaries capable of being easily ascertained and identified who would be entitled to the corpus of such unit or units in determinate and specific shares	 either immediately on the death of such life tenant or after anoth er life interest. The remainder in respect each set of unit or units allocated to the respective relative specified in the Second Schedule was	 there fore	 liable to be as sessed in the hands of the trustees under section 21(1) "in the same manner and to the same extent" as each beneficiary in respect of his determinate and known share in such remain der. That excluded the applicability of s.21 (4) in the assessment of the remainder. [756 'D E	 F	 H	 757 A C]