Summarize the following court judgment. itions Nos. 4158 4182 of 1978. (Under article 32 of the Constitution of India) F.S. Nariman	 B.R. Agarwala and P.G. Gokhale for the Petitioners. B. Sen	 I.N. Shroff and H.S. Parihar for Respondents Nos. 1 & 2. R.K. Garg	 section Balakrishnan and M.K.D. Namboodiry for Respondent No. 3. P.R. Mridul	 Mrs. Shobha Dikshit and Mrs. Urmila Kapoor for the intervener. The Judgment of the Court was delivered by CHANDRACHUD	 C.J. These are 25 petitions under Article 32 of the Constitution of India challenging the decision of the Reserve Bank of India as regards the introduction of common seniority and inter group mobility amongst different grades of officers belonging to Group I (Section A)	 Group II and Group III	 with retrospective effect from May 22	 1974. That decision or order is contained in Administration Circular No. 8 dated January 7	 1978 as also in Office Order No. 679 dated April 27	 1978 and has been acted upon in the draft combined seniority list of officers in Grade 'B ' (appointed as such prior to January 1	 1970) and in Grades 'C '	 'D '	 'E ' and 'F ' The contention of the petitioners is that the aforesaid circular	 office order and combined seniority list are violative of their fundamental rights under Articles 14 and 16 of the Constitution	 and are also ultra vires the power	 jurisdiction and competence of the Reserve Bank of India	 being without the authority of law and in contravention of the provisions of the . The facts leading upon the impugned decision dated January 7	 1978	 the office order dated April 27	 1978	 and the draft combined seniority list are as follows: The Reserve Bank of India (Respondent No. 1) was established under the 	 hereinafter referred to as "the Act". Under the Reserve Bank of India (Staff) Regulations	 1948 framed under section 58 of the Act	 the terms and conditions of service of the staff (including officers) of the respondent Bank were 418 revised and regulated. These Regulations were amended from time to time. Provisions regarding record of service	 seniority and promotion are contained in Regulations 27 to 30 (Chapter III)	 which read thus: "27. Record of Service: A record of service shall be maintained by the Bank in respect of each employee at such place or places and shall be kept in such form and shall contain such information as may be specified from time to time by the Chief Manager. Seniority: An employee confirmed in the Bank 's service shall ordinarily rank for seniority in his grade according to his date of confirmation in the grade and an employee on probation shall ordinarily rank for seniority among the employees selected along with him in the same batch according to the ranking assigned to him at the time of selection. Promotion: All appointments and promotions shall be made at the discretion of the Bank and notwithstanding his seniority in a grade	 no employee shall have a right to be appointed or promoted to any particular post or grade. (1) An employee transferred from one appointment to another or confirmed in a grade or appointment higher than his substantive grade or appointment	 shall be liable to be reverted with out notice at any time within one year of such transfer or confirmation. (2) An employee who has been appointed to officiate in a higher grade or appointment	 or whose confirmation in a higher grade or appointment is subject to his undergoing probation for any specified period or otherwise	 shall be liable to be reverted without notice at any time when he is so officiating or undergoing probation. (3) Nothing in sub regulations (1) and (2) shall affect the provisions of Regulation 47. " 419 Ever since the date of the Staff Regulations of 1948 and even prior thereto	 there were "groups" constituted for the different departments of the Reserve Bank	 and officers were required to exercise irrevocable options for service in any particular Group. Those who had opted for a service in a particular Group were to be normally eligible for promotion in that Group only. The grouping was revised with effect from April	 1951 when employees were asked to exercise their option with regard to the Group of their choice. In 1951	 the various departments of the Bank were re classified into three Groups	 Group I	 Group II and Group III. This system of grouping continued until 1955	 in which year the Bank found it necessary to reorganise the Agricultural Credit Department. Accordingly	 the staff attached to the various departments were regrouped into Groups I	 II	 III and IV	 with effect from April 1	 1957. In each of these Groups	 there are six grades of officers based on pay scales	 namely	 Grades A	 B	 C	 D	 E and F	 the lowest being Grade A and the highest being Grade F. Each Group had its own seniority List	 that is to say	 there were four separate seniority lists	 one for each group. The latest of such lists	 prior to the impugned combined seniority list	 is dated July 1	 1976. The Reserve Bank had constituted a Cadre Review Committee in 1970	 comprising Shri Justice J.L. Nain	 then a sitting Judge of the Bombay High Court	 Shri V. Isvaran	 I.C.S. (Retd.) and Prof. N.S. Ramaswamy	 a Management Expert. The Committee submitted a report in October 1972	 on the basis of which the Bank issued Administration Circular No. 15	 dated May 22	 1974	 specifying the decisions taken by it in the light of the recommendations made by the Committee. One such decision which the Bank took was to prepare a common seniority list for and to provide for inter group mobility at the lowest level officers in each group	 namely	 Grade A officers	 including those who were promoted to Grade B on or after January 1	 1970. With regard to higher grades (including officers in Grade promoted prior to January 1	 1970)	 the Bank decided to retain the "group wise seniority as at present". The inter group mobility in Grades C and D was to be introduced only to a limited extent	 namely	 "on a swap basis": It was first to be introduced in Grade C and thereafter to be extended "in due course" to the officers in Grade D. The two higher Grades viz. Grades E and F were left untouched and no intention was expressed in the above 420 circular to introduce either combined seniority or any scheme for inter mobility in these grades. In accordance with the decisions expressed in the aforesaid circular dated May 22	 1974	 the Bank published separate seniority lists of officers in Grade B and above for the years 1974	 1975 and 1976. The petitioners	 all of whom are officers in Group I	 were given their due seniority as of July 1	 1976. By the impugned Administration Circular No. 8	 dated January 7	 1978	 the Bank stated that it had decided to combine the seniority of all officers on the basis of their total length of service including officiating service) in Group I (Section A)	 Group II and Group III. The seniority of all officers in each of the three Groups was to be combined with effect from May 22	 1974 on the basis of their total length of service	 including officiating service	 in the grade in which they were then posted on a regular basis. The Circular introduced combined seniority with retrospective effect from May 22	 1974 (the date of Administration Circular No. 15) as it was "fair and equitable to the officers as a class". Briefly stated	 the effect of this decisions is that the group wise system of seniority which was in existence for more than 27 years stands substituted by a combined seniority for officers in Group I (Grade A) and in Groups II and III with retrospective effect. That has adversely affected the existing seniority of officers	 particularly of those in Group I	 who are now placed many places below their existing position of seniority	 some by several hundred places. According to the petitioners	 the Reserve Bank has no power	 competency or jurisdiction to introduce the impugned scheme which discriminates against officers in higher posts	 adversely affecting their vested and existing rights of seniority. The scheme	 according to them	 is without any rational and far from furthering the efficient functioning of the Bank	 it will affect it adversely by compelling officers to leave positions in which they had acquired long and valuable experience and work in posts for which they possess no expertise. For example	 for the Department of Banking Operations and Development (in Group II)	 the emphasis was laid on the commercial banking experience of officers whereas	 for recruitment and selection in the Agricultural Credit Department (in Group III)	 the emphasis was on experience in co operation and agricultural finance. That is why the Bank had laid the pre condition that the 421 selected officer should give a specific and irrevocable undertaking to serve in the Group for which he was selected. Another grievance of the petitioners is that although the Bank has stated in paragraph 9.2.1 of the impugned Circular that the seniority of officers will be combined on the basis of their total length of service	 the seniority list has in fact	 been prepared in a very arbitrary and iniquitous manner. In a large number of cases	 it is alleged	 the actual service rendered by the officers concerned has been arbitrarily reduced and adjusted in the length of service of other officers	 and the latter have been nationally treated as officiating in higher grades from dates much prior to their actual promotions to those grades. In some cases	 on the other hand	 officiation in higher posts has been wholly ignored. This has generally resulted in accelerated and discriminatory benefit being conferred upon officers mostly belonging to Groups II and III	 vis a vis the petitioners and the other officers in Group 1. The petitioners apprehend that a large number of officers who have been promoted since January 1	 1976 against normal vacancies in their own departments on the basis of their experience and expertise of the relative work are likely to be reverted and replaced by officers from other groups	 mostly from Group III	 who were selected for the specific job requirements of that group and who have no experience of the work done in the Group 1 departments. The petitioners also challenge the retrospective effect given to the impugned circular from May 22	 1974 as irrational and arbitrary. Further	 according to them	 the said circular dated January 7	 1978	 the Office Order dated April 27	 1978 and the combined seniority list are violative of the Reserve Bank (Staff) Regulations. In reply to the writ petition	 a counter affidavit has ceen filed on behalf of the Reserve Bank by Shri section L. Jathar	 Deputy Manager in the Department of Administration and Personnel	 Central Office	 Bombay. The case of the Bank	 as disclosed in that affidavit is as follows: The Reserve Bank of India (Staff) Regulations	 1948	 are not statutory in character	 not having been framed under section 58 of the . The said Staff Regulations did not provide for the division of the staff of the Bank into different groups but only categorised them as Officers	 Personal Assistants	 etc. In view of the growing need for specialisation in departments handling research work and developmental activities	 a functional segregation of departments into four groups	 with group wise 422 seniority for Officers	 was introduced in the year 1951. Appendix XII to the Report of the 'Reserve Bank of India Cadre Review Committee '	 which refers to the grouping of the departments from time to time	 shows that the groupings were not static and fixed but were changed as and when necessary. Group I was composed of General Departments dealing with the day to day operational functions of the Bank including accounts and organisational mattres	 Group II of Departments dealing with regulatory and inspection functions over the money market; Group III of Departments dealing with the Co operatives and agricultural Credit institutions; and Group IV of Research Departments. Each Department had a separate line of seniority and although the Bank had the right under the Staff Regulations to post any employee to any group	 each group operated as an independent seniority unit and the employees were eligible for promotion within their group only. It was	 however	 noticed that the group system had resulted in glaring inequalities in promotional opportunities in the various Departments	 because of the accelerated pace of expansion of Departments in some of the Groups wherein relatively junior employees were able to secure earlier promotions and confirmations. So far as the non officers staff was concerned	 the Bank took several steps from time to time to equalise their chances of promotion. Finally	 in pursuance of an agreement with the All India Reserve Bank Employees ' Association	 which is a representative Association of Class III employees of the Bank	 the Bank introduced a combined scheme for clerical staff in May 1972 under which	 the separate seniority lists of clerical employees in Class III were merged into one list with effect from 7th May	 1972	 irrespective of their respective groups. The validity of that Scheme was challenged in several High Courts and the matter came up on appeal to this Court from a decision of the Delhi High Court which has struck down the Scheme. This Court	 in Reserve Bank of India vs N.C. Paliwal(1) upheld the Scheme. The 'Cadre Review Committee ' whose report was received by the Bank on October 11	 1972 recommended	 broadly	 the gradual introduction of inter mobility of officers in different groups and the framing of a common seniority list	 except for officers in specialised groups like Economists	 statisticians	 Lawyers and Engineers. According to the Committee	 the most rational basis for drawing up a common seniority list was to go by the date of entry of each officer in a grade in a continuous officiating capacity. The Bank announced its decision as regards the Committee 's recommendations	 by the Administra 423 tive Circular dated May 22	 1974. In December 1975	 the Bank appointed a Departmental Committee under Shri C.L. Thareja	 the then Chief Manager of the Bank	 to work out the modalities of integration of the group wise seniority lists of officers in the higher grades which had not yet been integrated. That Committee submitted its report on December 15	 1976. It unanimously recommended simultaneous introduction of combined to seniority for all grades but	 its members could not agree on the date to be adopted for integration of the group wise seniority lists. The Chairman and one member favoured January 1	 1976 as the date of integration while the remaining two members favoured January 1	 1970. A Committee of the Central Board of the Bank decided to appoint May	 22 1974 as the date for integration as a via media and also because	 it was on that date that the Bank had announced to its officers its decision on combined seniority	 mobility and interchangeability. Fixation of January 1	 1970 as the date for integration would have adversely affected the interests of Group 1 officers while the other date January 1	 1976	 would have adversely affected the interests of officers in other groups. That is the answer made by the Reserve Bank to the petition. Originally	 the writ petition was filed against two respondents only; (1) The Reserve Bank of India and (2) the Chief Manager	 Reserve Bank of India	 Department of Administration & Personnel	 Central Office	 Bombay. The petitioners did not implead to the petition any of the officers belonging to the other groups who are likely to be affected if the relief sought by the petitioners is granted. Later	 by an order dated July 24	 1978	 respondents 3 and 4 were allowed to join in the petition on their own application. Respondent 3	 Shri M.P. Saxena	 was then the Deputy Chief Officer	 Department of Banking Operations and Development	 New Delhi	 while respondent 4	 Shri section Acharya	 was Deputy Chief Officer	 Agricultural Credit Department	 Chandigarh. Respondent 3	 whose counter affidavit has been adopted by respondent 4	 has raised a preliminary objection to the maintainability of the writ petition on the ground that hundreds of officers similarly situated who are all specifically identifiable and who would be prejudicially affected if the prayers in the writ petitions are granted	 have not been impleaded as respondents. According to him	 this is a case of a few privileged persons trying to retain their undue privileges at the cost of a scheme introduced to improve the 424 operational efficiency of the Institution and for the common good of the officers as a class. Respondent 3 has also raised the objection that no writ petition can lie under article 32 to enforce or challenge service conditions which are purely contractual. The contentions raised by respondent 3 in his counter affidavit may be summed up thus: Groupings and re groupings of departments have been undertaken by the Reserve Bank as and when the need arose in the context of changing requirements	 and all such groupings and regroupings have been done as a result of administrative decisions and given effect to through appropriate Administration Circulars. While the expedient of group wise promotions based on group wise seniority lists served the immediate convenience over a period of time	 this artificial segregation resulted in compartmentalised approach to questions of policy	 impairing thereby the overall efficiency of the institution as a whole. Further	 it also led to other anomalies and imbalances	 more particularly in promotional opportunities of the staff attached to different groups. In some groups	 expansion was quicker and greater than in others. It is in order to meet this situation that several measures were initiated by the Bank and by the Associations of employees of various categories. Since these measures did not meet the situation adequately	 the Bank initiated a dialogue with the respective Associations for introducing a combined seniority for the various grades in different groups. For officers at the base level	 namely	 'A ' Grade (direct recruits)	 the Bank had maintained a common list of seniority in place of group wise lists since 1968. Thereafter	 groupings and regroupings have been a continuous process to meet the needs of the changing situations	 and the present scheme of combined seniority which is one such	 has come about as a matter of administrative	 and historical and functional necessity. The implementation of the scheme of inter group mobility is being stalled by the Bank 's internal administration	 which was controlled solely by a small section of officers drawn from Group I	 which all along had unfair advantage of accelerated promotions as compared with officers in Groups II and III. Thus	 the petitioners ' plea is an attempt to perpetuate the unfair and unequal privileges which they had enjoyed over the years without any justification and with detriment to Bank 's interests a fact which has been recognised by an impartial tribunal like the Cadre Review Committee. The Staff Regulations of 1948 are in the nature of standardised contractual conditions of service. They were not framed under section 58 of the Act and 425 therefore	 it is competent to the Bank to alter them by administrative circulars. On these pleadings	 the three main questions which arise for our consideration are	 firstly	 whether the Reserve Bank of India (Staff) Regulations	 1948 are statutory in character; secondly	 whether it is competent to the Bank to provide for conditions of service of its staff by administrative circulars; and	 thirdly	 whether the impugned circular and seniority list offend against the provisions of articles 14 and 16 of the Constitution. The contention of the petitioner is that the Regulations were framed under section 58 of the ; that they cannot be altered by administrative circulars; that conditions of service cannot be framed by administrative circulars but must be framed by Regulations made under section 58 of the Act; and that	 the impugned circular and seniority list violate their right to equal treatment in the matter of their service conditions and career. The Reserve Bank and the contesting respondents have joined issue with the petitioners on all these questions. Turning to the first question	 section 58(1) of the provides that: "The Central Board may	 with the previous sanction of the Central Government	 make regulations consistent with this Act to provide for all matter for which provision is necessary or convenient for the purpose of giving effect to the provisions of this Act. " Sub section (2) of section 58 provides that in particular and without prejudice to the generality of the foregoing provision	 such regulations may provide for all or any of the matters mentioned in the various clauses of that sub section. Clause (j) refers to "the constitution and management of staff and supernnuation funds for the officers and servants of the Bank"	 while clause (r) refers to the subject: "generally	 for the efficient conduct of the business of the Bank". Sub sections (3) and (4) were inserted in section 58 by Act 51 of 1974. By sub section (3)	 any regulation made under section 58 shall have effect from such earlier or later date as may be specified in it. Sub section (4) requires that every Regulation shall	 as soon as may be after it is made by the Central Board	 be forwarded to the Central Government which	 in turn	 shall cause a copy of the same to be laid before each House of Parliament. Thereafter	 the 426 Regulation takes effect in accordance with the modifications	 if any	 made by the Parliament. A side argument may be disposed of briefly. It was suggested on behalf of the petitioners	 though faintly	 that the power to frame service conditions is derived from clause (j) of section 58 (2) of the Act. It is impossible to accept this contention. That clause cannot be split up to read: "the constitution and management of staff; and superannuation funds for the officers and servants of the Bank". It hardly makes any sense that way. What the clause means is: "the constitution and management of staff funds and superannuation funds for the officers and servants of the Bank". An important subject like the service conditions of the staff could not have been provided for in such a dubious and indirect manner. Nor indeed	 could it have been described as "constitution and management of staff. " A rule of seniority cannot properly fall under such a head. We endorse the view taken by the Calcutta High Court in Reserve Bank Employees Association vs Union of India(1) that section 58 (2) (j) refers to staff funds and superannuation funds and that it cannot comprise service conditions. But	 the provisions of sub section (2) of section 58 cannot be taken to be exhaustive of the power of the Central Board to make regulations. It is well settled that where a specific power is conferred without prejudice to the generality of a power already conferred	 the specific power is only illustrative and cannot restrict the width of the general power. (See Emperor vs Shibnath Barerjee;(2) Om Parkash vs Union of India(3). Therefore	 the ambit of the general power conferred by sub section (1) cannot be attenuated by limiting it to matters specified in sub section (2) of Section 58. Section 58 (1) of the Act confers power on the Central Board of Directors of the Bank to make regulations in order to provide for all matters for which provisions is necessary or convenient for the purpose of giving effect to the provisions of the Act. It seems to us clear that it is not only convenient but manifestly necessary to provide for the service conditions of the Bank 's staff in order to give effect to the provisions of the Act. The Act was passed in order to constitute a Bank for achieving economic purposes of the 427 highest national importance: regulating the issue of Bank notes	 keeping reserves with a view to securing monetary stability in India and generally to operate the currency and credit system of the country to its advantage. It is	 in our view	 not open to any question either on the basis of reason or authority that the power to provide for service conditions of the staff is at least incidental to the obligation to carry out the purposes for which the Bank was constituted. As observed in Armour vs Liverpool Corporation	(1) "To assist in removing from the minds of its employees the fear of an unprotected old age	 to foster their happiness and contentment and to procure their good and efficient service	 these are objects which	 even if economic considerations alone count	 are incidental	 if not vital	 to the proper carrying on of any undertaking as well by a municipal as any other corporation. " The doctrine of ultra vires in relation to the powers of a statutory corporation has to be understood reasonably and so understood	 "whatever may fairly be regarded as incidental to	 or consequential upon	 those things which the Legislature has authorised ought not (unless expressly prohibited) to be held by judicial construction	 to be ultra vires." (See Attorney General vs Great Eastern Ry. Co.(2) The Central Board has	 therefore	 the power to make service regulations under section 58 (1) of the Act. Shri Nariman pleads for such a power but his purpose in doing so is to urge that section 58 (7) is the sole repository of the power of the Central Board to provide for the conditions of service of the Bank 's staff. He contends that statutory corporations like the Reserve Bank of India have no inherent or residuary powers and that they must seek and find their powers and obligations in the Charter of their creation Therefore	 the argument proceeds	 it is imperative that regulations governing terms and conditions of service of the Bank 's staff must be framed under section 58 (1) only and cannot be framed by administrative circulars issued in the exercise of any non statutory power authority. In support of this submission	 reliance is placed by the learned counsel on the statement of law contained in paragraphs 1326 and 428 1333 (pages 775 and 779) of Halsbury 's Laws of England	 Fourth edition. In paragraph 1326 it is stated that: "Corporations may be either statutory or non statutory and a fundamental distinction exists between the powers and liabilities of the two classes. Statutory corporations have such rights and can do such acts only as are authorised directly or indirectly by the statutes creating them; non statutory corporations	 speaking generally	 can do everything that an ordinary individual can do unless restricted directly or indirectly by statute". Paragraph 1333 says that: "The powers of a corporation created by statute are limited and circumscribed by the statutes which regulate it	 and extend no further than is expressly stated therein	 or is necessarily and properly required for carrying into effect the purposes of its incorporation	 or may be fairly regarded as incidental to	 or consequential upon	 these things which the legislature has authorised. What the statute does not expressly or impliedly authorise is to be taken to be prohibited. " There is no doubt that a statutory corporation can do only such acts as are authorised by the statute creating it and that	 the powers of such a corporation cannot extend beyond what the statute provides expressly or by necessary implication. If an act is neither expressly or impliedly authorised by the statute which creates the corporation	 it must be taken to be prohibited. This cannot	 however	 produce the result for which Shri Nariman contends. His contention is not that the Central Board has no power to frame staff regulations but that it must do so under section 58 (1) only. On that argument	 it is material to note that section 58 (1) is in the nature of an enabling provision under which the Central Board "may" make regulations in order to provide for all matters for which it is necessary or convenient to make provision for the purpose of giving effect to the provisions of the Act. This provision does not justify the argument that staff regulations must be framed under it or not at all. The substance of the matter is that the Central Board has the power to frame regulations relating to the conditions of service of the Bank 's staff. If it has that power	 it may exercise 429 it either in accordance with section 58 (1) or by acting appropriately in the exercise of its general power of administration and superintendence. The statement of law in Halsbury puts emphasis on the limitation on powers of statutory corporations in the light of the provisions of statutes under which they are constituted. From that point of view	 the provisions of section 7 (2) of the Act are important. By that section	 the general superintendence and direction of the affairs and business of the Bank are entrusted to the Central Board of Directors	 which is empowered to exercise all powers and do all acts and things which may be exercised or done by the Bank. Matters relating to the service conditions of the staff are	 preeminently	 matters which relate to the affairs of the Bank. It would therefore be wrong to deny to the Central Board the power to issue administrative directions or circulars regulating the conditions of service of the Bank 's staff. To read into the provisions of section 58 (1) a prohibition against the issuance of such administrative directions or circulars is patently to ignore the scope of wholesome powers conferred upon the Central Board of Directors by section 7 (2) of the Act. Indeed	 this section brings the impugned circular and seniority list within the rule mentioned in Halsbury; they have the authority of the statute. In this behalf	 reliance is also placed by Shri Nariman on a decision of a Constitution Bench of this Court in Sukhdev Singh vs Bhagatram	(1) Ray	 C.J.	 who spoke for three members of the Bench	 observes in his judgment that the powers of statutory bodies are derived	 controlled and restricted by the statutes which create them and that any action of such bodies in excess of their power or in violation of the restrictions placed on their powers is ultra vires. The concurring judgment of Mathew	 J. also contains observations to the same effect (see pages 628	 630 and 659 of the Report). This enunciation of law is to the same effect as in Halsbury and our answer is the same. While issuing the administrative circular governing the staff 's conditions of service	 the Central Board of Directors has neither violated any statutory injunction nor indeed has it exercised a power which is 430 not conferred upon it by the statute. The circular is strictly within the confines of section 7 (2). So long as staff regulations are not framed under section 58 (1)	 it is open to the Central Board to issue administrative circulars regulating the service conditions of the staff	 in the exercise of power conferred by section 7 (2) of the Act. In T. Cajee vs U. Jormanik Siem	(1) a District Council was constituted under the Sixth Schedule to the Constitution	 for the United Khasi and Jaintia Hills District in the Tribal Areas of Assam. The rules in the Sixth Schedule empowered the District Council to make laws with respect to various matters regarding the administration of the District	 including the appointment or succession of Chiefs and Headmen. No law was however made regulating such appointments. Even so	 it was held by this Court that the District Council had the power to appoint or remove administrative personnel under the general power of administration vested in it by the Sixth Schedule. Delivering the leading judgment of the Bench	 Wanchoo	 J.	 said that where executive power impinges upon the rights of citizens	 it will have to be backed by an appropriate law; but where executive power is concerned only with the personnel of the administration	 it is not necessary that there must be laws	 rules or regulations governing the appointment of those who could carry on the administration under the control of the District Council. The District Council had therefore the power to appoint officers by virtue of the fact that the administration was vested in it. In B.N. Nagarajan vs State of Mysore(2) Rule 3 of the Mysore State Civil Services (General Recruitment) Rules	 1957 provided that recruitment to the State Civil Services shall be made by a competitive examination or by promotion and that the method of recruitment and qualifications shall be as set forth in the Rules specially made in that behalf. It was urged before this Court that no recruitment could be made to any service until the rules were made. That argument was rejected on the ground that it is not obligatory under the proviso to article 309 to make rules of recruitment before a service can be constituted and that it was not necessary that there must be a law in existence before the executive is enabled to function. It is true that reliance was placed in that case on the provisions of article 162	 by which the executive power of a State extends to the matters with respect to 431 which the legislature of the State has power to make laws. But the decision is useful for illustrating that the power to frame rules or regulations does not necessarily imply that no action can be taken administratively in regard to a subject matter on which a rule or regulation can be framed	 until it is so framed. The only precaution to observe in the cases of statutory corporations is that they must act within the framework of their charter. Its express provisions and necessary implications must at all events be observed scrupulously. It may bear mentioning that any action taken by the Central Board of Directors under section 7(2) is subject to the directions given by the Central Government under section 7(1) just as any regulation framed by it under section 58 is subject to the previous sanction of the Central Government. In either case	 the Central Board has to abide by the decision or directions of the Central Government. There can therefore	 be no apprehension that	 by taking action under section 7 (2)	 the Central Board may circumvent the condition on which the power conferred by section 58 can be exercised by it. The overall authority of the Central Government acts as a restraining influence on any action taken by the Central Board	 whether it acts under one or the other provision of the Act. Having seen that the Central Board has the power to provide for service conditions of the staff by issuing administrative circulars	 the next question for consideration is whether the Staff Regulations of 1948 were issued under section 58 of the Act. The importance of this question lies in the fact that	 quite clearly	 if the 1948 Regulations are statutory	 they cannot be altered by administrative circulars and	 in that event	 the impugned circular will not have the effect of superseding them. Having considered the entire material on this subject including the correspondence that has transpired between the Reserve Bank and the Central Government	 we find it difficult to take the view that the Staff Regulations of 1948 were framed in the exercise of power conferred by section 58. One fact which stands out in this regard is that whereas section 58 (1) envisages the making of regulations "with the previous sanction of the Central Government"	 the Regulations of 1948 do not purport to have been made with such sanction. Indeed	 in so far as the ex facie aspect of the matter is concerned	 the Regulations of 1948 do not purport to have been made under section 58 at all. It is true that this by itself is not conclusive because	 failure to mention the source of power 432 cannot invalidate the exercise of power	 if the power is possessed by the authority which exercises it. But	 the common course of the manner in which the Central Board exercises its power when it purports to do so under section 58 is not without relevance and has an important bearing on the question under consideration. The Employees ' Provident Fund Regulations of 1935	 the Note Issue Regulations of 1935 the General Regulations of 1949	 the Scheduled Banks ' Regulations of 1951 and the Guarantee Fund Regulations	 which were all framed under section 58	 contain a preamble reciting that they were framed under that section and that they were framed with the previous sanction of the Central Government. By way of illustration	 we may cite the preamble of the Reserve Bank of India General Regulations	 1949	 which runs thus: "In exercise of the powers conferred by section 58 of the (II of 1934) and in supersession of the Reserve Bank of India General Regulations	 1935	 the Central Board of the Reserve Bank of India	 with the previous sanction of the Central Government	 is pleased to make the following Regulations. " It is significant that such a recital is conspicuously absent in the Regulations of 1948. That renders it safe and reasonable to accept the statement contained in the counter affidavit filed on behalf of the Reserve Bank by Shri Shamrao Laxman Jathar Deputy Manager in the Department of Administration and Personnel to the effect that the Staff Regulations of 1948 are not statutory in character	 not having been made under section 58 of the Act of 1934. The rejoinder affidavit dated July 16	 1979 filed on behalf of the petitioners by Shri Jamnadas Gupta reiterates the contention that the Regulations of 1948 were framed under section 58 (1) with the sanction of the Central Government. Support is sought to that contention from the correspondence annexed to the affidavit filed in support of the writ petition and the correspondence annexed to the rejoinder. Of particular importance is the statement contained in the 'Memorandum to the Central Board ' dated January 21	 1949	 submitted by the then Governor of Reserve Bank	 Shri C.D. Deshmukh	 on the subject of "Reserve Bank of India Regulations". That Memorandum contains a list of regulations which were made by the Central Board "with the approval of the Central Government". The very first item in the list is "Reserve Bank of India (Staff) Regulations". Having considered the correspondence bearing on the subject and particularly the aforesaid Memorandum	 we see no reason to doubt 433 the contention of the Bank that the Regulations of 1948 were not framed under section 58 and that they were not made with the previous sanction of the Central Government. The then Governor of the Reserve Bank of India	 Shri C. D. Deshmukh	 a distinguished Economist and Civilian	 was perhaps justified in assuming from the correspondence that the Central Government has no objection to the proposed regulations	 which explains his statement	 that they were made with the "approval" of the Central Government. But	 it is one thing to infer that the Regulations had the approval of the Central Government since no objection was raised by it to the making of the regulations and quite another that they were made with its previous sanction. The supplementary affidavit dated March	 1980 which was filed on behalf of the Reserve Bank by Shri Pradeep Madhav Joshi	 Deputy Manager in the Department of Administration and Personnel	 has dealt fully with the correspondence on the subject of previous sanction of the Central Government to the Regulations of 1948. We are inclined to accept the statement contained in paragraph 9 of the said affidavit that the Memorandum of January 21	 1949 contains a "factual mistake" to the effect that the Staff Regulations	 (which would include the Regulations of 1948) were made with the approval of Central Government. We therefore conclude that the Reserve Bank of India (Staff) Regulations of 1948 were not made under section 58 of the Act and that	 in fact	 the Central Board had not obtained the sanction of the Central Government to the making of those Regulations. The High Courts of Bombay	(1) Calcutta and Delhi(2) have all taken the view that the Staff Regulations of 1948 are not statutory	 not having been framed under section 58 of the Act. We endorse the correctness of that view. Since the Staff Regulations of 1948 are in the nature of administrative directions	 it was competent to the Central Board to alter or amend them by an administration circular. No lack of statutory powers is involved in that process. Under section 7 (2)	 the Central Board has the power to provide for service conditions of the Bank 's staff by administration circulars	 so long as they do 434 not impinge upon any Regulations made under section 58 of the Act. It now remains to be considered whether the impugned Administration Circular	 No. 8	 dated January 7	 1978; Office Order No. 679	 dated April 27 1978; and the draft Combined Seniority List of officers prepared pursuant thereto	 are violative of the petitioners ' right to equality in the matter of their service conditions. The salient features of the impugned Administration Circular may be summarized thus: (a) A common seniority and inter group mobility is introduced simultaneously in all Grades of officers attached to Group I (Section A) and Groups II and III. (b) The seniority of all officers is combined as on May 22	 1974	 on the basis of their total length of service (including officiating service)	 in the grade to which they were then posted on a regular basis. In doing so	 the existing inter se seniority of the officers in the respective groups is maintained and the subsequent supersessions for promotion or confirmation in the respective groups are suitably reflected. The date of confirmation is not taken into account for this purpose. (c) The Circular covers all officers in Group I (Section A) and Groups II and III who were appointed to Grade 'B ' prior to January 1	 1970 as well as officers in the higher grades 'C '	 'D '	 'E ' and 'F '. The Circular does not cover officers in Sections B to L of Group I	 technical officers in Group III and officers attached to Group IV. (d) All promotions to Grade 'C ' and above which were made on a provisional basis after January 1	 1976 are to be reviewed individually in order to ascertain as to which of the officers may be allowed to continue in the higher grade on the basis of their seniority and suitability. Consequential adjustments are to be made in a phased and 435 gradual manner in order to ensure that the operational efficiency of the various departments and the Bank 's requirements of a specialised staff of officers are not adversely affected. (e) Officers promoted to higher grades prior to January 1	 1976 are to be allowed to retain their existing grades	 though not necessarily the same posts	 and their seniority is to be adjusted under a common seniority scheme. (f) Officers appointed to officiate in the higher grade on a provisional basis on or after January 1	 1976 and who are allowed to continue in such grade on the basis of their seniority and suitability	 are to be considered for confirmation in the normal course. (g) Officers who are in a lower grade but who rank higher in seniority in the common seniority list than those who are already officiating or confirmed in the higher grade	 are to be considered for promotion on the basis of their suitability. (h) All future promotions to Grade 'C ' and to the higher grades are to be made on the basis of the common seniority list	 subject to selectivity. (i) Wherever possible	 the transfer of officers from one department or group to another in the same grade has to be encouraged in order to enable a broader diffusion of experience and to prepare a wider base for development of officers in different departments. (j) All promotions from Grade 'B ' to 'C ' are to be made on the basis of seniority cum suitability	 with greater emphasis on suitability. The selections for this purpose are to be made by the Reserve Bank of India Services Board. (k) Selections for promotions to Grade 'D ' and above are to be made by a Committee of the Deputy 436 Governors	 who are to give greater consideration to merit apart from the aptitude and experience of the officers concerned. Office Order No. 679	 dated April 27	 1978 was issued in pursuance of the aforesaid Circular. The Bank announced by it that the tentative Combined Seniority List of officers in Grade 'B ' (appointed prior to January 1	 1970) and Grades 'C '	 'D '	 'E ' and 'F ' would be available for inspection upto May 12	 1978. Officers aggrieved by the tentative Seniority List were asked to submit their representations within fifteen days. The tentative Combined Seniority List shows the proposed position occupied seniority wise by 644 officers belonging to Group I (Section A) and Groups II and III. These writ petitions were filed by the petitioners on June 10	 1978 in order to challenge the Administration Circular	 the Office order and the Combined Seniority List referred to above. The 25 petitioners are all officers in Group I. The case of the petitioners is that the Administrative Circular and the draft Combined Seniority list are violative of their rights under articles 14 and 16 of the Constitution because; (a) The combined fixation of seniority has the effect of treating unequals as equals in so far as officers belonging to different groups are concerned	 whose appointment	 recruitment	 promotion and seniority had all along been fixed	 accepted and acted upon on a group wise basis; and (b) Recruitment	 selection and promotion of officers having been made on a group wise basis from time to time and their seniority having been fixed accordingly	 the seniority is now fixed retrospectively from an arbitrary date viz.	 May 22	 1974. These contentions	 particularly the first	 have to be answered in the light of historical data governing the constitution and management of Services under the Reserve Bank	 from time to time. Without an awareness of the history leading to the events which the petitioners have challenged as unconstitutional	 it will not be possible either to appreciate their contention or to provide an answer to it. The Reserve Bank of India was constituted on April 1	 1935 under the . The main purpose of constituting the Bank	 as stated in the Preamble 437 of the Act was "To regulate the issue of bank notes and the keeping of reserves with a view to securing monetary stability in India and generally to operate the currency and credit system of the country to its advantage. " In course of time	 new functions came to be added as a result of new measures so as to meet the growing needs of an expanding economy. During the first decade after the inception of the Bank in 1935	 these functions were carried out through three departments: The Banking Department	 the Issue Department and the Agricultural Credit Department. The Agricultural Credit Department was trifurcated into three branches with effect from August 1	 1945: (i) the Agricultural Credit Department	 (ii) the Department of Research and Statistics and (iii) the Department of Banking Operations. The first two branches	 which were of a specialised nature	 were grouped together for the purposes of promotions of officers while the third branch was grouped for that purpose with the banking group on the General Side. All promotions were made from two separate common seniority lists	 one for the specialised or technical group and the other for the banking group. The departments were regrouped again into three Groups	 with effect from April 1	 1951. Group I consisted of Staff attached to the Department of Research and Statistics	 Group II of the Staff attached to the Department of Banking operations	 the Department of Banking Development and the Agricultural Credit Department and Group III of the Staff attached to the other Departments on the General Side. The Staff attached to the Agricultural Credit Department was reconstituted into a new Group	 namely	 Group IV with effect from April 1	 1955. The Industrial Finance Department and the Department of Non Banking Companies were added to Group II in September 1957 and March 1966	 respectively. Group V was created for the staff of the Industrial Department Bank of India with effect from April 1	 1965. The composition of the five Groups was readjusted on that date to ensure greater administrative efficiency. This system of grouping had many drawbacks bearing on the promotional opportunities of Officers in the various Groups. To mention but a few	 the drawbacks were: (i) Unequal size of one Group as compared to another	 (ii) Uneven expansion in one Group as compared to another	 and (iii) Earlier confirmations of Officers in one Group as compared to those in another. 438 In 1955	 Group I was the largest of all the three Groups on the basis of the total number of officers in Grades 'B ' and above in each of the three Groups. The subsequent expansion in staff strength has been greater in Groups II and III than in Group I with the result that by the end of 1975	 the total strength of Officers in Grade 'B ' and above was the smallest in Group I as compared to the other Groups. The number of officers in Grade 'A '	 however	 continues to be the largest in Group I on account of the operational nature of its functions. While the increase in the total number of officers in Grade 'B ' and above in Group I over a period of twenty years was 280%	 the corresponding increase in Groups II and III was 451% and 1100% respectively. However	 the large expansion in Groups II and III was mainly at the junior officers 'level ' particularly in Grade 'B '. As regards senior officers i.e. Officers in Grades 'D '	 'E ' and 'F ' while the expansion in Groups I and II could be regarded as more or less equal	 the expansion in Group III	 particularly in Grade 'D ' was marked. In spite of this	 the total number of posts of senior officers and the percentage of such posts as compared with those of junior officers continued to be smaller in Groups II and III. Officers in Groups II and III also took a longer time generally for confirmation as the posts against which they were promoted were either initially sanctioned on a temporary basis and continued as such for quite sometime before they were made permanent or the vacancies were caused by deputation of regular officers to commercial banks	 state co operative banks	 etc. for which no permanent vacancies were created. On the other hand	 Group I had more or less its normal growth during these years and there was a smooth flow of normal vacancies. The officers recruited in the early years of the Bank had also gradually started reaching the age of superannuation and there was a regular flow of retirement vacancies. The Officers in Group I had	 therefore	 their confirmation quickly and thereby derived distinct benefits. Under the Bank 's rules	 the seniority of an Officer in a particular grade was ordinarily dependent on the date of his confirmation in that grade and although for the purpose of promotion	 the seniority of an officer was given weightage only within the same group for a notional comparison of seniority of officers in different Groups an officer who was confirmed earlier in one Group as compared with another who was confirmed later in another Group had an edge over the latter in matters of service benefits. Such comparisons 439 arising from promotional imbalances in the various groups caused resentment among the affected officers. This state of affairs had long agitated the minds of the officers in Groups II and III and they brought this state of affairs to the management 's notice by various representations beginning from 1968. The Management of the Bank took several steps from time to time to correct the promotional imbalances but these steps did not touch even the fringe of the problem	 especially since	 the ad hoc schemes and proposals were mainly aimed at correcting imbalances that the lower level. Ultimately	 in face of growing discontentment amongst officers belonging to Groups II and III	 the Management decided to refer the question to the Cadre Review Committee (CRC) a which was appointed by the Bank in May 1970. The Committee was	 among other things	 required to examine and make recommendations for the changes desirable in the existing constitution of the cadres of officers; having due regard to the need to provide reasonable prospects of increments and promotion and to ensure such degree of inter changeability as administrative efficiency and exigencies of the Bank 's services demanded. The Committee	 under the Chairmanship of Shri J.L. Nain	 a sitting Judge of the Bombay High Court	 submitted its report in October 1972. The Cadre Review Committee expressed the view that there was irrationality in the way the groupings had been done and the way in which seniority was being maintained group wise and that Group I had an unfair advantage in matters of promotion over Groups II and III. The Committee further held that as certain departments were inordinately large as compared to others	 this by itself	 in the context of absence of inter group mobility brought about imbalances in promotional opportunities. The Committee also recognised that mobility from one group to another would not only facilitate removing the imbalances in promotional opportunities but that it would also lead to "better operational efficiency". The Committee stressed the need for a common seniority list for each grade of officers throughout the Bank	 except in respect of the Economic and Statistics Departments and among lawyers	 engineers and other technical sections of officers. It recommended a system of promotion from a lower grade to higher grade which would ensure	 among other things	 to the largest extent possible	 equality of opportunity of promotion among all officers in the same grade 440 and effective operation of mobility of officers between different departments and groups. In regard to the operation of the combined seniority scheme	 the Committee recommended its immediate introduction for 'A ' and 'B ' grades and within a period of two years for the 'C ' grade. In regard to the rest of the grades	 namely	 'D '	 'E ' and 'F '	 the Committee recommended the application of this principle mutatis mutandis and left it to the discretion of the Bank to introduce it as and when it chose	 taking into consideration the exigencies of the situation. The Committee was also of the view that it was necessary that mobility and inter changeability as between groups among all grades of officers should be introduced in the shortest time possible. Following the recommendations of the Cadre Review Committee	 the Bank introduced through an administrative circular (No. 15	 dated 22.5.1974)	 a combined seniority for 'A ' and part of 'D ' grades	 with retrospective effect. In regard to 'C ' and 'D ' Grades	 the circular provided for mobility and interchangeability on a swap basis	 but the Officers ' Association protested against it and demanded immediate and simultaneous introduction of combined seniority and interchangeability for the rest of the grades also. Following the persistent demand made by the majority of the officers	 the Bank appointed a Committee comprising Shri C.L. Thareja	 the then Chief Manager	 as Chairman	 Shri K. Madhava Das	 Chief Officer	 Agricultural Credit Department	 Shri P.N. Khanna	 Chief Officer	 Department of Banking Operations and Development	 and Shri T.D. Katara	 Manager	 Bombay Office	 to work out the modalities of the implementation of the combined seniority scheme for grades 'C ' to 'F ' and to determine the operative date for combining the seniority. The Bank decided that pending the submission of the report by this Committee	 all future promotions namely those effected from 1.1.1976	 will be purely ad hoc and provisional. The Thareja Committee	 like the Cadre Review Committee	 unanimously recommended the introduction of combined seniority simultaneously for all grades of officers. However	 on the question of the operative date	 it was divided in its views. Whereas Shri Thareja and Shri Katara	 both Group I officers	 recommended that the scheme be given retrospective effect from January 1	 1976	 the 441 other two members representing Groups II and III	 were of the view that it should be given effect from January 1	 1970. The Bank	 by the impugned circular	 accepted May 22	 1974 as the date from which the combined seniority list was to have effect. It is clear from this narration of historical events that the various Departments of the Reserve Bank were grouped and regrouped from time to time. Such adjustments in the administrative affairs of the Bank are a necessary sequel to the growing demands of new situations which are bound to arise in any developing economy. The group system has never been a closed or static chapter and it is wrong to think that the officers of the various groups were kept	 as it were	 in quarantine. The group system has been a continuous process of trial and error and the impugned scheme of inter group mobility has emerged as the best solution out of the experience of the past. Combined seniority has been recommended by two special committees	 whose reports reflect the expertise and objectivity which was brought to bear on their sensitive task. It is clear that inter group mobility and common seniority are a safe and sound solution to the conflicting demands of officers belonging to Group I on one hand and those of Groups II and III on the other. Private interest of employees of public undertakings cannot override public interest and an effort has to be made to harmonize the two considerations. No scheme governing service matters can be fool proof and some section or the other employees is bound to feel aggrieved on the score of its expectations being falsified or remaining to be fulfilled. Arbitrariness	 irrationality	 perversity and mala fides will of course render any scheme unconstitutional but the fact that the scheme does not satisfy the expectations of every employee is not evidence of these. Vested interests are prone to hold on to their acquisitions and we understand the feelings of Group I officers who have to surrender a part of the benefits which had accrued to them in a water tight system of grouping. Combined seniority is indispensable for the smooth functioning of the Bank and no organisation can function smoothly if one section of its officers has an unfair advantage over others in matters of promotional opportunities. The reports of the Cardre Review Committee and the Thareja Committee show that combined seniority has emerged as the most acceptable solution as a matter of administrative	 historical and functional necessity. We see no justification for undoing 442 what these committees have achieved after an objective and integral examination of the whole issue. We may mention that the conclusion to which these committees came were considered by the Bank when Shri M. Narasimhan	 later India 's Executive Director in the World Bank	 was the Governor and it was after Dr. I.G. Patel	 Formerly Secretary	 Economic Affairs	 Govt. of India and Deputy Administrator	 United Nations Development Programme	 took over as Governor in December 1977 that the final decision was taken by the Central Board to introduce inter group mobility and combined seniority. In Reserve Bank of India vs N.C. Paliwal	 a Combined Seniority Scheme was introduced by the Reserve Bank of India	 consisting of two parts	 one part provided for the integration of the clerical staff of the General Departments with the clerical staff of the Specialised Departments	 while the other provided for the switch over and integration of the non clerical staff with the clerical staff in all the Departments of the Bank. The Delhi High Court set aside the Scheme on the ground that it violated Articles 14 and 16 of the Constitution. While setting aside the judgment of the High Court	 this Court held that the integration of different cadres into one cadre did not involve violation of the equality clause and that neither Article 14 nor Article 16 forbids creation of different cadres in Government service. Whether there should be a combined seniority in different cadres or groups was	 according to the Court	 a matter of policy which did not attract the applicability of the equality clause. The integration of non clerical with clerical services which was effectuated by the Combined Seniority Scheme was	 in the circumstances	 held to be not violative of the guarantee contained in Articles 14 and 16. As regards the retrospective operation given to the Scheme with effect from May 22	 1974	 it does appear that the Board has struck a via media between two extreme contentions advanced by officers belonging to Group I and those belonging to Groups II and III. But that was inevitable and we consider it as the best solution in the peculiar circumstances of the case. In order to rectify the imbalances and anomalies caused by the compartmentalised and group wise seniority	 it was necessary to give retrospective effect to the Combined Seniority List. Officers belonging to Group I urged that the Scheme should be brought into effect from January 1	 1976	 while those belonging to Groups II and III wanted the Scheme to 443 be brought into effect from January 1	 1970. The Central Board struck a balance by choosing the date May 22	 1974	 because that was the date on which the decision in regard to combining the seniority retrospectively with effect from January 1	 1970 in regard to Grade 'A ' and part of Grade 'B ' officers was announced. It was	 again	 on that date that the Bank had announced that a similar decision in regard to the remaining grade	 of officers was under its considerations. Thus	 at least on May 22	 1974 it was known to officers of all grades that a combined seniority list was due to be brought into force. If a certain section of officers succeeded in obtaining promotional benefits thereafter	 the imbalance introduced thereby in the services of the Bank and the consequent dissatisfaction had to be rectified. That could only be done by not recognising the accelerated promotions obtained in the intervening period by a certain class of officers. Shri Nariman has drawn our attention to various individual cases of officers in Group I whose old seniority has gone down by several steps in the new Scheme. As we have stated earlier	 any scheme of seniority is bound to produce isolated aberrations. That cannot justify the argument that the entire Scheme is for that reason violative of the guarantee of equality. We are	 therefore	 of the opinion that the impugned Administration Circular	 the Office Order and the Combined Seniority List are not violative of the rights of the petitioners under Articles 14 and 16 of the Constitution. For these reasons	 the Writ Petitions are dismissed	 but there will be no order as to costs. S.R. Petitions dismissed.

Under the Reserve Bank of India (Staff) Regulations	 1948 framed under section 58 of the 	 the terms and conditions of service of the staff (including officers) in the Reserve Bank were revised and regulated from time to time. Ever since the date of the Staff Regulations of 1948 and even prior thereto	 there were "groups" constituted for the different departments of the Reserve Bank	 and officers were required to exercise irrevocable options for service in any particular Group. Those who had opted for a service in a particular Group were to be normally eligible for promotion in that Group only. The grouping was revised with effect from April 1951 when employees were asked to exercise their option with regard to the Group of their choice. In 1951	 the various departments of the Bank were re classified into three Groups	 Group I	 Group II and Group III. This system of grouping continued until 1955	 in which year the Bank found it necessary to reorganise the Agricultural Credit Department. Accordingly	 the staff attached to the various departments were regrouped into Groups I	 II	 III	 and IV	 with effect from April 1	 1957. In each of these Groups	 there are six grades of officers based on pay scales	 namely	 Grades A	 B	 C	 D	 E and F	 the lowest being Grade A and the highest being Grade F. Each Group had its own seniority list	 that is to say	 there were four separate seniority lists	 one for each group. The latest of such lists prior to the draft combined seniority list of 1978 is dated July 1	1976. Earlier to the said list dated July 1	 1976	 the Reserve Bank had constituted a Cadre Review Committee in 1970 followed by another Committee. On the 412 basis of the report submitted by the Cadre Review Committee in October 1972	 the Bank issued an Administrative Circular No. 15 dated May 22	 1974 specifying the decisions taken by it in the light of the recommendations made by the Committee. One such decision which the Bank took was to prepare a common seniority list for and to provide for inter group mobility at the lowest level of officers in each group	 namely	 Grade A officers	 including those who were promoted to Grade B on or after January 1	 1970. With regard to higher grades (including officers in Grade B promoted prior to January 1	 1970)	 the Bank decided to retain the "group wise seniority as at present". The inter group mobility in Grades C and D was to be introduced only to a limited extent	 namely	 "on a swap basis". It was first to be introduced in Grade C and thereafter to be extended "in due course" to the officers in Grade D. The two higher Grades	 namely	 Grades E and F were left untouched and no intention was expressed in the above circular to introduce either combined seniority or any scheme for inter mobility in these grades. In accordance with the decisions expressed in the Administrative Circular dated May 22	 1974 the Bank published separate seniority lists of officers in Grade B and above for the years 1974	 1975 and 1976. By the Administrative Circular No. 8 dated January 7	 1978	 the Bank stated that it had decided to combine the seniority of all officers on the basis of their total length of service (including officiating service) in Group I (Section A)	 Group II and Group III. The seniority of all officers in each of the three Groups was to be combined with effect from May 22	 1974 on the basis of their total length of service	 including officiating service	 in the grade in which they were then posted on a regular basis. The Circular introduced combined seniority with retrospective effect from May 22	 1974 (the date of Administration Circular No. 15) as it was "fair and equitable to the officers as a class". The effect of this decision is that the group wise system of seniority which was in existence for more than 27 years stands substituted by a combined seniority for officers in Group I (Grade A) and in Groups II and III with retrospective effect. That has adversely affected the existing seniority of officers	 particularly of those in Group I	 who are now placed many places below their existing position of seniority	 some by several hundred places. Hence these twenty five petitions under article 32 by the petitioners	 all of whom are officers in Group I	 and who are given their due seniority as on July 1	 1976. Dismissing the petitions	 the Court ^ HELD: 1:1. The Administrative Circular No. 8 dated 7 1 1978	 the Office Order No. 679 dated 22 4 1978 and the draft combined seniority list are not violative of the rights of the petitioners under Articles 14 and 16 of the Constitution. Whether there should be a combined seniority in different cadres or groups is a matter of policy which does not attract the applicability of the equality clause. [442 D F] Reserve Bank of India vs N. C. Paliwal	 ; 	 applied and followed. 413 1:2. The historical events make it clear that the various Departments of the Reserve Bank were grouped and regrouped from time to time. Such adjustments in the administrative affairs of the Bank are a necessary sequel to the growing demands of new situations which are bound to arise in any developing economy. The group system has never been a closed or static chapter and the officers of the various groups were not kept	 as it were	 in quarantine. The group system has been a continuous process of trial and error and the impugned scheme of inter group mobility has emerged as the best solution of the experience of the past. Combined seniority has been recommended by two special committees	 whose reports reflect the expertise and objectivity which was brought to bear on their sensitive task. [441 B D] 1:3. Inter group mobility and common seniority are a safe and sound solution to the conflicting demands of officers belonging to Group I on one hand and those of Groups II and III on the other. Private interest of employees of public undertakings cannot override public interest and an effort has to be made to harmonize the two considerations. No scheme governing service matter can be fool proof and some section or the other of employees is bound to feel aggrieved on the score of its expectations being falsified or remaining to be fulfilled. [441 D E] Arbitrariness	 irrationality	 perversity and mala fides will of course render any scheme unconstitutional but the fact that the scheme does not satisfy the expectations of every employee is not evidence of these. Vested interests are prone to hold on to their acquisitions and the Group I officers have to surrender a part of the benefits which had accrued to them in a water tight system of grouping. Combined seniority is indispensable for the smooth functioning of the Bank and no organisation can function smoothly if one section of its officers has an unfair advantage over others in matters of promotional opportunities. The reports of the Cadre Review Committee and the Thareja Committee show that combined seniority has emerged as the most acceptable solution as a matter of administrative	 historical and functional necessity. Further	 the conclusion to which these committees came were considered by the Bank when Shri M. Narasimhan	 later India 's Executive Director in the World Bank	 was the Governor and it was after Dr. I.G. Patel	 Formerly Secretary	 Economic Affairs	 Govt. of India and Deputy Administrator	 United Nations Development Programme	 took over as Governor in December 1977 that the final decision was taken by the Central Board to introduce inter group mobility and combined seniority. [441 E H	 442 A B] 2. As regards the retrospective operation given to Scheme with effect from May 22	 1974	 it does appear that the Board has struck a via media between two extreme contentions advanced by officers belonging to Group I and those belonging to Groups II and III. But that was inevitable and it was the best solution in the peculiar circumstances of the case. In order to rectify the imbalances and anomalies caused by the compartmentalised and group wise seniority	 it was necessary to give retrospective effect to the Combined Seniority List. Officers belonging to Group I urged that the Scheme should be brought into effect from January 1	 1976	 while those belonging to Groups II and III wanted the Scheme to be brought into effect from January 1	 1970. The Central Board struck a balance by choosing the date May 22	 1974	 because that was the date on which 414 the decision in regard to combining the seniority retrospectively with effect from January 1	 1970 in regard to Grade 'A ' and part of Grade 'B ' officers was announced. It was	 again	 on that date that the Bank had announced that a similar decision in regard to the remaining grades of officers was under its consideration. Thus	 at least on May 22	 1974 it was known to officers of all grades that a combined seniority list was due to be brought into force. If a certain section officers succeeded in obtaining promotional benefits thereafter	 the imbalance introduced thereby in the services of the Bank and the consequent dissatisfaction had to be rectified. That could only be done by not recognising the accelerated promotions obtained in the intervening period by a certain class of officers. Any scheme of seniority is bound to produce isolated aberrations and that fact cannot justify the argument that the entire scheme is for that reason violative of the guarantee of equality. [442 F H	 443 A D] 3:1. The power to frame service conditions is not derived from clause (j) of section 58(2) of the . Section 58(2) (j) refers to staff funds and superannuation funds and it cannot comprise service conditions. Clause (j) cannot be split up to read: "the constitution and management of staff: and superannuation funds for the officers and servants of the Bank". It hardly makes any sense that way. What the clause means is: "the constitution and management of staff and superannuation funds for the officers and servants of the Bank". An important subject like the service conditions of the staff could not have been provided for in such a dubious and indirect manner. Nor indeed	 could it have been described as "constitution and management of staff". A rule of seniority cannot properly fall under such a head. [426 A D] Reserve Bank Employees Association vs Union of India	 approved. Where a specific power is conferred without prejudice to the generality of a power already conferred	 the specific power is only illustrative and cannot restrict to width of the general power. Therefore	 the ambit of the general power conferred by sub section (1) cannot be attenuated by limiting it to matters specified in sub section (2) of section 58	 the provisions whereof are not exhaustive of the power of the Central Board to make regulations. [426 D F] Emperor vs Shibnath Banerjee	 72 I.A. 241; Omparkash vs Union of India	 A.I.R. 1971 SC 771	 773	 774	 referred to. The doctrine of ultra vires in relation to the powers of a statutory corporation has to be understood reasonably and so understood	 "whatever may fairly be regarded as incidental to	 or consequential upon	 those things which the Legislature has authorised ought not (unless expressly prohibited) to be held by judicial construction to be ultra vires". The Central Board of Directors of the Reserve Bank has the power to make service regulations under section 58(1) of the Act. The Board is vested with power to make regulations in order to provide for all matters for which provision is necessary or convenient for the 415 purpose of giving effect to the provisions of the Act and it is not only convenient but manifestly necessary to provide for the service conditions of the Bank 's staff in order to give effect to the provisions of the Act. It cannot be denied that the power to provide for service conditions of the staff is at least incidental to the obligation to carry out the purposes for which Bank was constituted. [426 G H	 427 A D] Armour vs Liverpool Corporation	 	 434	 435; Attorney General vs Great Eastern Ry. Co.	 5 Appeal Cases 473	 quoted with approval. There is no doubt that a statutory corporation can do only such acts as are authorised by the statute creating it and that	 the powers of such a corporation cannot extend beyond what the statute provides expressly or by necessary implication. If an act is neither expressly or impliedly authorised by the statute which creates the corporation	 it must be taken to be prohibited. But	 section 58(1) being in the nature of an enabling provision under which the Central Board "may" make regulations in order to provide for all matters for which it is necessary or convenient to make provisions for the purposes of giving effect to the provisions of the Act	 the Central Board has the power to frame regulation relating to the conditions of service of the Bank 's staff. If it has that power	 it may exercise it in accordance with section 58(1) or by acting appropriately in the exercise of its general power of administration and superintendence. [428 E F	 G H	 429A] 4:3. By section 7(2) of the 	 the general superintendence and direction of the affairs and business of the Bank are entrusted to the Central Board of Directors	 which is empowered to exercise all powers and do all acts and things which may be exercised or done by the Bank. Matters relating to the service conditions of the staff are	 pre eminently	 matters which relate to the affairs of the Bank. It would therefore be wrong to deny to the Central Board the power to issue administrative directions or circulars regulating the conditions of service of the Bank 's staff. To read into the provisions of section 58 (1) a prohibition against the issuance of such administrative directions or circulars is patently to ignore the scope of wholesome powers conferred upon the Central Board of Directors by section 7 (2) of the Act. While issuing the administrative circular governing the staff 's conditions of service	 the Central Board of Directors has neither violated any statutory injunction nor indeed has it exercised a power which is not conferred upon it by the statute. The circular is strictly within the confines of section 7 (2). [429 A E	G H	 430 A] Sukhdev Singh vs Bhagatram	 ; 	 reiterated. So long as staff regulations are not framed under section 58 (1)	 it is open to the Central Board to issue administrative circulars regulating the service conditions of the staff	 in the exercise of power conferred by section 7 (2) of the Act. The power to frame rules or regulations does not necessarily imply that no action can be taken administratively in regard to a subject matter on which a rule or regulation can be framed	 until it is so framed. The only precaution to observe in the cases of statutory corporations is that they must act within the framework of their charter. Its express provisions and necessary implications must at all events be observed scrupulously. [430 A B	 431 A B] 416 T. Cajee vs U. Jormanik Siom	 ; ; B.N. Nagarajan vs State of Mysore	 	 explained and applied. Any action taken by the Central Board of Directors under section 7 (2) is subject to the directions given by the Central Government under section 7(1)	 just as any regulation framed by it under section 58 is subject to the previous sanction of the Central Government. In either case	 the Central Board has to abide by the decision or directions of the Central Government. There can	 therefore; be no apprehension that	 by taking action under section 7 (2)	 the Central Board may circumvent the condition on which the power conferred by section 58 can be exercised by it. The overall authority of the Central Government acts as a restraining influence on any action taken by the Central Board	 whether it acts under one or the other provision of the Act. [431 B D] 5:1. A consideration of the entire material on the subject	 including the correspondence that has transpired between the Reserve Bank and the Central Government and in particular the Memorandum of January 21	 1949	 makes it clear that the Staff Regulations of 1948 were not framed in the exercise of power conferred by section 58 of the Act and that they were not made with the previous sanction of the Central Government. Whereas section 58 (1) envisages the making of regulations "with the previous sanction of the Central Government"	 the Regulations of 1948 do not purport to have been made with such sanction. Indeed	 in so far as the ex facie aspect of the matter is concerned	 the Regulations of 1948 have not been made under section 58 at all. The statement contained in paragraph 9 of the counter affidavit of the Deputy Manager dated March 30	 1980 that the Memorandum of January 21	 1949 contains a "factual mistake" to the effect that the Staff Regulations (which would include the Regulations of 1948) were made with the approval of the Central Government	 correctly clarifies the position. It is one thing to infer that the Regulations had the approval of the Central Government since no objection was raised by it to the making of the Regulations and quite another that they were made with its previous sanction. [431 F H	 433 B D] Reserve Bank Employees Association vs Union of India	 ; Emperor vs Shibnath Barerjee; 72 I.A. 241; Om Parkash vs Union of India A.I.R. 1971 S.C. 771	 773	 774; Reserve Bank of India vs N.C. Paliwal	[1977] 1 SCR 377; Bimal Kumar Shome vs P.C. Bhattacharya	 Misc. Petition No. 206 of 1967 decided on August 6	 1969 (Bombay H.C.) R.M. Joshi vs The Reserve Bank of India	 Civil Writ No. 876 of 1974 decided on March 19	 1980 by a Full Bench (Delhi H.C.)	 approved 5:2. Since the Staff Regulations of 1948 are in the nature of administrative directions	 it was competent to the Central Board to alter or amend them by an administrative circular. No lack of statutory powers is involved in that process. Under section 7(2)	 the Central Board has the power to provide for service conditions of the Bank 's staff by administration circulars	 so long as they do not impinge upon any Regulations made under section 58 of the Act. [433 F G	 434 A] 417