Summarize the following court judgment. Civil Appeal No. 91 of 1971 From the Judgement and order dated 21.8.1978 of the Punjab & Haryana High Court in R.S.A. No. 378 of 1963. Civil Appeal No. 639 of 1985 From the Judgment and Order dated 3.12.1984 of the Punjab & Haryana High Court in R.S.A. No. 1721 of 1976. S.K. Bagga for the Appellants. H.K. Puri for the Respondents. The Judgment of the Court was delivered by RANGANATH MISRA	 J. These two appeals by special leave are directed against two different judgments of the Punjab & Haryana High Court in suits for pre emption. The facts of the two cases are different In this Appeal the alienation was on November 22	 1972	 by one Nathu and his wife Smt. Singari in favour of outsiders	 Plaintiffs claimed possession of the property by way of pre emption on the ground that they have superior rights being father 's brother 's sons of Nathu covered under Section 15(1)(a) THIRDLY of the Punjab Pre emption Act	 1913. That claim was decreed so far as Nathu 's half share in the property was concerned and the claim as against the alienation of half share by his wife was rejected. The alienees ' appeal to the District Judge as also the High Court did not succeed. A constitution Bench of this Court in the case of Atam Parkash vs State of Haryana	 ; 	 has recently held: "There is	 therefore	 no reasonable classification and clauses 'First '	 'Secondly ' and 'Thirdly ' in section 15(1)(a). are	 therefore	 declared ultra vires the Constitution. " The result of this decision in Atam Parkash 's case is that section 15(1)(a) THIRDLY is	 and was not	 available to the plaintiffs to base their claim of pre emption upon. 639/85 has	 therefore	 to be allowed and the decree passed by the trial Court as upheld in the first and second appeals must be reversed. Plaintiffs ' suit for pre emption has to be dismissed. Since the reversal is the outcome of a judgment delivered by this Court during the pendency of the civil appeal	 we direct parties to bear their respective costs throughout. 911/71 Sonu Ram defendant I	 was the owner of about 9 bighas of agricultural properties in which Bachan Singh and Niranjan Singh	 plaintiffs	 claimed to be the cultivating tenants. Sonu Ram sold the property under a registered sale deed dated July 22	 1959. The tenant filed a suit on July 21	 1960	 for a decree for possession by preemption. With effect from February 4	 1960	 Section 15 of the Punjab Pre emption Act	 1913 ( 'the Act ' for short)	 was amended by Act 10 of 1960. Under the amendment	 inter alia	 a new clause was inserted in s.15(1)(a)	 namely	 "FOURTHLY" which reads as under: "FOURTHLY	 in the tenant who holds	 under tenancy of the vendor the land or property sold or a part thereof." The Amending Act brought in a new provision by way of Section 31 to the following effect: 381 "Punjab Pre emption (Amendment) Act	 1960	 to apply to all suits No Court shall pass a decree in a suit for preemption whether instituted before or after the commencement of the Punjab Pre emption (Amendment) Act	 1960	 which is inconsistent with the provisions of the said Act. " The trial Court as also the first appellate Court took the view that on the date when the sale took place the plaintiffs had no right of pre emption and as such the claim was not maintainable. Before the High Court in Second Appeal the appellants placed reliance on the Constitution Bench decision of this Court in Amir Singh & Anr. vs Ram Singh & Ors.	 The High Court took the view that on the date of sale the plaintiffs had no right infringed though they had such right on the date of the suit. As one of the requirements of the law was that the plaintiffs to succeed in a suit for pre emption should have a superior right of pre emption on the date of sale also the plaintiffs ' claim could not be decreed. The High Court	 therefore	 upheld the decree of the courts below. We have heard learned counsel for both the sides at some length and are inclined to agree with the submissions advanced on behalf of the appellants that all the three courts have gone wrong in dismissing the claim. Gajendragadkar	 J. (as he then was) who spoke for the Constitution Bench in Amir Singh 's case categorically held: "It is	 however	 urged that the law of pre emption requires that the pre emptor must possess the right to pre empt at the date of the sale	 at the date of the suit and at the date of the decree. This position cannot be disputed. But when it is suggested that the respondents cannot claim that they had the right when they brought the present suit or when the sales were effected	 the argument ignores the true effect of the retrospective operation of section 31 and section 15. If the inevitable consequence of the retrospective operation of section 31 is to make the substantive provisions of section 15 also retrospective	 it follows that by fiction introduced by the retrospective operation	 the rights which the respondents claim under the amended provisions of section 15 must be deemed to have vested in them at the relevant time. If the relevant provisions are made retrospective by the legislature	 the retrospective operation must be given full effect to	 and that 382 meets the argument that the right to pre empt did not exist in the respondents at the time when the sale transactions in question took place. Therefore	 we are satisfied that the respondents are entitled to claim that they should be given an opportunity to prove their case that as tenants of the lands in suit they have a right to claim pre emption. " In view of the categorical indication that section 15 was retrospective	 it must follow that the newly inserted clause FOURTHLY in section 15(1)(a) of the Act was in existence at all relevant times. So far as facts of this case are concerned	 the plaintiffs must be presumed to have had a right to pre empt on the date of sale. Admittedly	 the suit was filed subsequent to the amendment. It is a well settled principle of law that when the legislature makes provision for a deeming situation to give effect to the mandate of the legislature	 all things necessary to effectuate the retrospective intention must be deemed to have existed. All the courts in our view clearly went wrong in dealing with the legal situation. The High Court erroneously distinguished the rule in Amir Singh 's case even though the ratio applied in all fours. The judgments and decrees of all the three courts are set aside. The plaintiffs are found entitled to pre empt the alienee under section 15(1)(a) FOURTHLY of the Act as amended by the Act of 1960. We allow the appeal	 reverse the decrees of all the courts below and direct that the plaintiffs ' suit shall be decreed. Plaintiffs shall be entitled to their costs throughout. The trial Court is directed to give effect to the decree passed by this Court. M.L.A. Appeal allowed.

The respondents in Civil Appeal No. 639 of 1985 claimed possession of the property sold by one Nathu on November 22	 1972 by way of pre emption on the ground that they had superior rights being father 's brother 's sons of Nathu covered under Section 15(1)(a) THIRDLY of the Punjab Pre emption Act	 1913. The claim was decreed and the alienees ' appellants appeal to the District Judge as also the High Court did not succeed. Hence this appeal by Special Leave. In Civil Appeal No. 911 of 1971 respondent No. 1 was the owner of some agricultural property in which appellants plaintiffs claimed to be the cultivating tenants. Respondent No. 1 sold the aforesaid property on July 22	 1959. The appellants tenants filed a suit on July 21	 1960 for a decree for possession by pre emption. The Trial Court	 the first appellate court as also the High Court took the view that on the date when the sale took place	 the appellants had no right of pre emption and	 as such	 the claims was not maintainable. Allowing the appeals	 ^ HELD: (In C.A. No. 639 of 1983) 1. The decree passed by the trial court as upheld in the first and second appeals must be reversed in view of the decision of the Supreme Court in Atam Prakash vs State of Haryana	 ; holding clauses First	 Secondly and Thirdly in section 15(1)(a) as ultra vires the Constitution. Therefore	 section 15(1)(a) THIRDLY is and was not available to the respondents plaintiffs to base their claim of pre emption upon. [380D] 379 (In C.A. No. 911 of 1971) 2. All the three Courts have gone wrong in dismissing the claim of the appellants plaintiffs. They are found entitled to pre empt the alienees under section (15)(1)(a) FOURTHLY of the Act as amended by Act of 1960. [381E; 382D E] 3.1 It is a well settled principle of law that when the legislature makes provision for a deeming situation to give effect to the mandate of the legislature	 all things necessary to effect retrospective intention must be deemed to have existed. [382C D] 3.2 With effect from February 4	 1960 section 15 of the Punjab Pre emption Act 1913 was amended by Act 10 of 1960. The inevitable consequence of the retrospective operation of section 31 is to make the substantive provisions of section 15 also retrospective. It follows that by the fiction introduced by retrospective operation	 the rigths which the appellants claimed under the amended provisions of section 15 must be deemed to have vested in them at the relevant time. Therefore	 the appellants must be presumed to have had a right to pre empt on the date of sale. [380F G; 381G; 382B C] Amir Singh & Anr. vs Ram Singh & Ors.	 	 referred to.