Summarize the following court judgment. Civil Appeal No. 840 of 1978. Appeal by Special Leave from the Judgment and order dated 14th December 1977 of the Punjab and Haryana High Court in Civil Revision No 613/74. Govind Das	 Mrs. Urmila Kapoor and Mrs. Shobha Dixit for the Appellant. M.N. Phadke	 N.C. Jain	 S.K. Dhingra and S.L. Sethia for the Respondent. The Judgment of the Court was delivered by PATHAK	 J. This appeal by special leave is directed against a judgment of the High Court of Punjab & Haryana dismissing a tenants ' revision petition. under section 15(5)	 East Punjab Urban Rent Restriction Act	 1949 arising out of eviction proceedings. The respondent	 as landlord	 applied under section 13(2) (ii) (a) of the East Punjab Urban Rent Restriction Act	 1949 for the possession of a shop forming part of the premises No. 6283	 Nicholson Road. Ambala Cantonment occupied by the appellants. He claimed that the shop had been let out to the first appellant	 Gurcharan Singh but that he had without the written consent of the respondent	 sublet the shop to his father	 Gurdayal Singh and his brothers	 Anoop Singh and Jagjit Singh. The appellants denied that the shop had been sub let and pleaded that they	 along with their father constituted a joint Hindu family	 and that the joint Hindu family was the tenant of the shop. The Rent Controller found in favour of the respondent and passed an order of eviction	 which was subsequently affirmed by the Appellate Authority. The appellants applied in revision	 and the High Court has	 by its judgment and order dated 14th December	 1977 dismissed the revision application. The first contention of the appellant is that there is no evidence that the shop was sub let	 and the finding is misconceived in ' point of law. 493 It is sufficient to point out that the Rent Control Authorities and the High Court have concurrently found that the shop was let out to Gurcharan Singh and not to the joint Hindu family	 and that Gurcharan Singh sub let it in 1967 to a partnership firm consisting of his father and brother. The finding is supported by ample evidence on the record. The material shows that the shop was let out to Gurcharan Singh alone	 and the business carried on by him was later taken over by a partnership consisting of his father and brothers. He was no longer proprietor of the business	 and merely extended his assistance under a power of attorney enabling him to	 act for the partnership. The execution of the power of attorney establishes that he was not a partner. It appears that Gurcharan Singh individually carried on some other business	 but there is no evidence to show that business was lodged in the shop under consideration. The material before us demonstrates that the shop was occupied exclusively by the partnership firm and that Gurcharan Singh was left with no right to possession therein. The evidence is incompatible with the case	 now set up before us	 that the partnership was merely a licensee of Gurcharan Singh. Learned counsel for the appellants relies on Hira Singh & Ors. vs Banarsi Dass. That case. however	 was one of a joint tenancy	 and it was held that the mere circumstance that one of the co tenants had ceased living in the premises for some time could not lead to the inference that he had sub let it to the other co tenants. The evidence Showed that all the co tenants were carrying or business in partnership	 although one of them was not disclosed was a partner. Some reliance was placed on the circumstance that the licence for carrying on the business stood in the name of Gurcharan Singh. As the evidence plainly shows	 the licence was issued to him when he was carrying on the business	 and subsequently	 although it continued to stand in his name	 it was. used by the partnership firm	 and no inquiry was ever made by the licensing authority	 when renewing it	 to determine whether the original holder of the licence was still carrying on the business. We are of opinion that the finding of the High Court and the Rent Control authorities that Gurcharan Singh had sub let the shop is unassailable. Learned counsel for the appellants contends next that the ground sub letting taken under the East Punjab Urban Rent Restriction Act	 1949 is not available to the respondent because on the date when the sub letting took place that Act was not in force in the Ambala Cantonment. Now	 it appears that section 3 of the Cantonments (Extension 494 of Rent Control Laws) Act	 1957 empowered the Central Government to extend	 by notification	 to any cantonment with such restrictions and modifications as it thought fit	 any enactment relating to the t control of rent and regulation of house accommodation which was in force on the date of the notification in the State in which the cantonment was situated. In exercise of that power	 the Central Government issued Notification No. SRO 7. dated 21st November	 1969 extending the East Punjab Urban Rent Restriction Act	 1949 to cantonments in the States of Haryana & Punjab. Consequently	 with effect from 21st November. 1969 the East Punjab Urban Rent Restriction Act became a law operating in the cantonment. Section 13 (2) (ii) (a) of the Act provides for an order of eviction if the Controller is satisfied "that the tenant has	 after commencement of this Act	 without the written consent of the landlord (a) transferred his right under the lease or sub let the entire building or rented land or any portion thereof. " It is clear that the tenant falls within the mischief of this sub clause only if he has effected the transfer or sub letting after the commencement of the Act. The Act commenced to operate in the Ambala Cantonment on 21st November	 1969. In regard to that territory	 it was not law before that date	 but only on and from that date. It is clear that the sub letting in the present case having been effected in 1967	 was not made after the commencement of the Act. Learned counsel for the respondent urges that section 13(2)(ii)(a) of the Act uses the words "has sub let"	 and submits that sub letting is a continuous process and that even though in the present case it may be said to have commenced before the Act came into force it continued in operation after the Act was brought into force. Now	 when section 13(2)(ii)(a) speaks of a tenant who "has sub let"	 it refers to a tenant who has entered into a transaction of sub letting. And the transaction of sub letting is referable to a single point of time. It is the moment when the act effecting the sub letting is completed. That transaction is located at a fixed point. What happens then is that a flowing stream of rights and obligations issues from the sub letting. Those rights continue as long as the sub lease subsists. but they have their source in the definitive transaction of sub letting located in a single fixed point of time. We may add that in the context of section 13(2)(ii)(a) of the Act. the words "has sub let" imply that the sub letting must subsist on the date when the Act comes into force. The reason is apparent from the object of the Act	 which is to protect the personal occupation of the tenant. The protection is not extended to a tenant who has abandoned occupation of the premises and has passed possession to another	 even though by way of a sub tenancy. 495 The protection against eviction is not available for permitting a tenant to make a profit out of his tenancy rights by sub letting the premises. Therefore	 the words "has sub let" unqualified by any reference to the commencement of the Act. refer to a transaction of sub letting entered into before or after the commencement of the Act	 and in the case where sub letting has been effected before the commencement of the Act the sub lease must subsist	 and the rights under it continue to flow	 on the date of the commencement of the Act. In the present case	 however	 section 13(2)(ii)(a) of the Act confines its scope to sub leases effected after the commencement of the Act	 that is to say	 transactions of sub letting effected after the date when the Act came into force. For that reason	 a sub letting effected before the commencement of the Act cannot be brought within the mischief of section 13(2)(ii)(a) even though it continues to subsist on or after the commencement of the Act. In Goppulal vs Thakurji Shriji Shriji Dwarkadheeshji & Anr. on which learned counsel for the respondent relies	 the relevant provision did not include the words "after the commencement of this Act". and	 therefore	 took within its scope a sub letting transacted before the coming into force of the relevant Act. In our opinion	 the respondent cannot avail of section 13(2)(ii)(a) of the East Punjab Urban Rent Restriction Act on the basis that it was brought into operation in the Ambala Cantonment by the Notification of 1969. We find	 however	 that the Cantonment (Extension of Rent Control Laws) Act	 1957 was amended by Act No. XXII of 1972. Upon amendment	 section 1(2) of the principal Act declared that the principal Act would be deemed to have come into force on 26th January	 1950. The words "on the date of the Notification" were omitted in section 3(1) of the principal Act	 and were deemed always to have been omitted	 so that under section 3 the Central Government must be deemed to have been empowered always to extend to a cantonment any enactment relating to the control of rent and regulation of house accommodation in force in the State even as it stood before the date of the Notification. This amendment was made in order to accord with the further amendment made by inserting sub section (3) in section 3 of the principal Act	 which provided that where an enactment in force in any State relating to the control of rent and regulations of house accommodation was extended to a cantonment from a date earlier than the date of such extension was made	 such enactment	 as in force on such earlier date	 would apply to such cantonment. Section 3(2) was added in the principal Act	 and it provided: 496 "2. The extension of any enactment under sub section (1) may be made from such earlier or future date as the Central Government may think fit: Provided that no such extension shall be made from a date earlier than (a) the commencement of such enactment	 or (b) the establishment of the cantonment	 or (c) the commencement of this Act	 whichever is later. " Subject to the proviso	 the Central Government now enjoyed power to extend an enactment from a date earlier than the date of the notification or from a future date. Subsequently	 the Central Government issued Notification No. SRO 55	 dated 24th January	 1974 superseding the earlier Notification No. SRO 7	 dated 21st November	 1969 and extending the East Punjab Urban Rent Restriction Act afresh to cantonments in the States of Haryana and Punjab. Section 1(3) of that Act was modified to read that	 except for section 19	 it would be deemed to have come into force on 26th January. The result is that the East Punjab Urban Rent Restriction Act will be deemed to have come into force in the Ambala Cantonment on 26th January	 1950. And if that be so	 the sub letting effected in 1967 must plainly be regarded as having been made after the commencement of that Act. Two points are raised on behalf of the appellants against that conclusion. The first is that the power under section 3 of the having been exercised once	 that is to say	 by the Notification dated 21st November	 1969	 the power of extension stood exhausted and could not be availed of again	 and therefore the Notification dated 24th January	 1974 was without statutory sanction and invalid. We are referred to Lachmi Narain etc.	 etc. vs Union of India & Ors. That was a case where this Court held that a Notification under section 2 Part States (Laws) Act	 1950 having been issued in 1951 by the Central Government extending the Bengal Finance (Sales Tax) Act	 1941 to the State of Delhi	 the power given by section 2 exhausted itself on the extension of the enactment and could not be exercised again to enable the issue of a fresh Notification modifying the terms in which the Bengal Act was extended. The case is clearly distinguishable. The power under which the Notification dated 24th January	 1974 has been issued is a separate and distinct power from that under which the Notification dated 21st November	 1969 was made. The power now exercised passed into the 	 497 1957 when it was amended in 1972. In its nature and quality it is not identifiable with the power vested under the unamended Act. A power conferred by statute is distinguished by the character and content of its essential components. If one or more material components characterising the power cannot be identified with the material components of another	 they are two different and distinct powers. Although broadly the power envisaged in section 3 of the amended is a power of extension even as it was under the unamended Act	 there is a vital qualitative difference between the two. The power under the unamended Act was a limited power. It could operate prospectively only. There was no choice in the matter. After amendment	 the Act provided for a power which could be exercised retrospectively. The power extended to giving retrospective effect to an enactment in force in the State in the form in which that enactment was in force on the date on which the extension was made. It was a power whose reach and cover extended far beyond what the power under the unamended Act could achieve. We are of the view that in issuing the Notification dated 24th January	 1974 and thereby extending the East Punjab Urban Rent Restriction Act to the Ambala Cantonment retrospectively with effect from 26th January	 1950	 the Central Government exercised a power not available to it when it issued the Notification dated 21st November	 1969. The contention that the issue of the Notification of 24th January	 1974 amounted to a further exercise of power conferred by section 3 of the 	 under which the earlier Notification was issued is without force and must be rejected. The second point raised is that in clause (c) of the proviso to section 3(2) of the 	 which speaks of "the commencement of this Act"	 the words "this Act" refer to the Cantonments (Extension of Rent Control Laws) Amendment Act	 1972	 which commenced to operate from 2nd June	 1972. The argument is founded in fallacy. The words "this Act" refer to the principal Act in which sub section 3(2) is inserted by virtue of the amendment	 and that Act	 by virtue of section 2(2) as amended	 must be deemed to have come into force on 26th January	 1950. In the result	 the appeal fails and is dismissed with costs. Appeal dismissed.

Section 3 of the empowers the Central Government to extend by notification to any cantonment any enactment relating to the control of rent and regulation of house accommodation which was in force on the date of notification in the State in which the cantonment was situated. In exercise of this power the Central Government by a notification dated November 21	 1969 extended the East Punjab Urban Rent Restriction Act	 1949 to the cantonments in the States of Haryana and Punjab. By virtue of section 3(2) which was added in the 1957 Act in 1972	 the Central Government enjoyed power to extend an enactment from a date earlier than the date of notification or from a future date. In January	 1974 the Central Government issued a notification superseding tho earlier notification dated November 21	 1969 and extended afresh the 1949 Act to cantonments in Haryana and Punjab. Section 13(2)(ii)(a) of the 1949 Act provides for an order of eviction if the Controller is satisfied that the tenant has	 after the commencement of this Act without the written consent of the landlord has sublet the entire building or a portion thereof. The respondent landlord in the instant case applied for possession of his premises in Ambala Cantonment under the occupation of the appellant tenant on the ground that without his written consent the tenant had sub let the shop. The appellant claimed that it was the joint Hindu family of which he was a member that was the tenant and therefore there was no question of the premises being sub let by him to the joint family. The Rent Controller ordered eviction. His order was affirmed by the appellate authority. The High Court dismissed the tenant 's revision application. Before this Court it was contended that (1) there was no evidence that the shop was sub let; (2) since the 1949 Act was not in force in the Ambala Cantonment in 1967 when the sub letting was alleged to have taken place	 the landlord could not avail of the provisions of that Act and (3) the notification issued in 1974 was without statutory sanction and was invalid because once the Central Government had exercised the power in 1969 that power stood exhausted and the Government could not invoke it again in 1974. 491 Dismissing the appeal	 ^ HELD: 1 The finding of the High Court and the Rent Controller that the tenant had sub let the shop is unassailable. The shop	 to begin with	 was let out to the appellant alone and not to the joint Hindu family. The business carried on by him was later taken over by a partnership consisting of the father and brothers and he was no longer the proprietor of the business. [493 G & B] 2(a) The 1949 Act became law operating in the Ambala Cantonment with affect from November 21	 1969 when the Central Government extended that Act to the cantonments in Haryana and Punjab. The sub letting having taken place in 1967 when the 1949 Act was not in force the landlord could not avail of the provisions of that Act. [494B D] (b) In the context of section 13(2)(ii)(a) of the 1949 Act the words "has sub let" imply that the sub letting must subsist on the date when the Act came into force. Tho words "has sub let"	 if they are unqualified by any reference to the commencement of the Act	 refer to a transaction of sub letting entered into before or after commencement of tho Act and in a case where sub letting has been effected before the commencement of the Act the sub lease must subsist	 and the rights under it continue to now	 on the date of the commencement of the Act. In the present case	 section 13(2)(ii)(a) confines its scope to sub leases effected after the commencement of the Act	 that is to say	 transactions of sub letting effected after the date when the Act came into force. For that reason	 a sub letting effected before the commencement of the Act cannot be brought within the mischief of the section even though it continues to subsist on or after the commencement of the Act. [494H; 495A B] Goppulal vs Thakurji Shriji Shriji Dwarkadheeshji & Anr. ; held inapplicable. 3(a) By virtue of tho amendments made to tho 1957 Act in 1972 the 1949 Act will be deemed to have come into force in the Ambala cantonment on January 26	 1950. Therefore	 the sub letting effected in 1967 must plainly be regarded as having been made after the commencement of that Act. [496D E] (b) In issuing the notification dated January 24	 1974 and thereby extending the 1949 Act to the Ambala Cantonment retrospectively with effect from January 26	 1950 tho Central Government exercised a power not available to it when it issued tho earlier notification of November 21	 1969. The contention that the notification of January	 1974 amounted to a further exercise of the same power conferred by section 3 of the 1957 Act is without force. [497 D E] The power under which the notification of January	 1974 had been issued is a separate and distinct power from that under which the earlier notification was made. The power now exercised passed into tho 1957 Act when it was amended in 1972. In its nature and quality it is not identifiable with the power vested under the unamended Act. A power conferred by statute is distinguished by the character and content of its essential components. If one or more material components characterising the power cannot be identified with the material components of another	 they are two different and distinct powers. The power under the unamended Act was a limited Dower 492 which could operate prospectively only while the power after amendment was retrospective. It was a power whose reach and cover extended far beyond what the power under the unamended Act could achieve. [497 A C] (c) The words "this Act" occurring in the commencement of this Act" in clause (c) of the proviso to section 3(2) of the 1957 Act refer to the principal Act in which sub section (2) was inserted in section 3 and not to the Amendment Act of 1972. By virtue of section 2(2) as amended it is the principal Act which must be deemed to have come into force on January 26	 1950 [497 G]