Summarize the following court judgment. : Criminal Appeal Nos. 422 424 of 1988. From the Judgment and Order dated 12.2.1986 and 4.9.1986 from the High Court of Punjab and Haryana in Crl. No. 5837 of 1985 and Crl. No. 4488 and 2993 of 1986 respectively. R.S. Suri for the Appellants. M.R. Sharma	 Kapil Sibal	 M.C. Dhingra	 T.S. Arora and Miss Kamini Jaiswal for Respondents. PG NO 914 The Judgment of the Court was delivered by OJHA	 J. These appeals raise an identical question of law and can conveniently be decided by a common order. Kailash Nath	 respondent in Criminal appeal No. 422/88	 was working as Executive Engineer in Public Works Department in the State of Punjab in the year 1979. On various dates in that year	 he placed orders for the purchase of sign boards which were required by the Department to avoid accidents on roads and for traffic safety. The requisite sign boards were purchased in pursuance of the aforementioned orders. In the year 1980 some complaints were received in the Department against the respondent pertaining to the purchase of the sign boards. vigilance enquiry was instituted by the Vigilance Bureau to enquire into the complaints and ultimately a First Information Report was lodged on August 27	 1985 against the respondent under sub sections (1) and (2) of Section 5 of the Prevention of Corruption Act. In the meantime	 the respondent had retired from the post of Executive Engineer with effect from October 31	 1982. The aforesaid First Information Report was challenged by the respondent in the High Court of Punjab and Haryana in Criminal miscellaneous No. 5837 M/85 on the ground that the same having been lodged about three years after his retirement and about six years after the event of purchase of sign boards in 1979 was in the teeth of Rule 2.2 of the Punjab Civil Service Rules	 Volume II and consequently was liable to be quashed. The plea raised by the respondent found favour with the High Court which relying on an earlier decision of that Court in Des Raj Singhal vs State of Punjab	 quashed the First Information Report by its order dated February 12	 1986. Mangal Singh Minhas	 the respondent in Criminal Appeal Nos. 423 24/1988	 was posted in the Industrial Supply Section of the Directorate of Industries where various types of raw materials including wax and import lincences are dealt with. A First Information Report was lodged against the respondent on June 19	 1980. It appears that the respondent applied in the High Court of Punjab and Haryana for quashing of the First Information Report on account of which challan could not be filed and it was only when the challenge to the First Information Report was repelled by the High Court that a challan was filed on August 28	 1985 In the meantime	 the respondent retired as Superintendent	 Directorate of Industries	 Punjab	 on September 30	 1983. On the challan being filed the respondent again made an application in the High Court for quashing of the prosecution against him. This prayer has been allowed by the PG NO 915 High Court by its order dated September 4	 1986 and the prosecution against the respondent has been quashed relying on the aforesaid decision in the case of Des Raj Singhal vs State of Punjab. The present appeals have been filed by the State of Punjab against the aforesaid orders passed on the application of Kailash Nath and Mangal Singh Minhas respectively. It has been urged by learned counsel for the appellant that Rule 2.2 of the Punjab Civil Service Rules has been misinterpreted by the High Court in holding that the said Rule placed an embargo on initiating judicial proceedings for prosecution of a government servant on the expiry of four years of the cause of action or the event referred to in the said rule and the High Court committed an error of law in taking the said view. Learned counsel for the respondents	 on the other hand	 submitted that the view taken by the High Court was correct and in view of Rule 2.2 the First Information Report against Kailash Nath and the prosecution as against Mangal Singh Minhas were rightly quashed. In order to appreciate the respective submissions made by learned counsel for the parties with regard to the scope and interpretation of Rule 2.2	 it would be useful to extract the relevant portion of sub rule (b) of Rule 2.2. It reads: "(b) The Government further reserve to themselves the right of withholding or withdrawing a pension or any part of it	 whether permanently or for a specified period and the right of ordering the recovery from a pension of the whole or part of any pecuniary loss caused to Govt. if in a departmental or judicial proceedings	 the pensioner is found guilty of grave misconduct or negligence during the period of his service	 including service rendered upon re employment after retirement. Provided that: (1) . . (2) . . (3) No such judicial proceedings	 if not instituted while the officer was in service	 whether before his retirement or during his re employment shall be instituted in respect of a cause of action which arose or an event which took place more than four years before such institution: PG NO 916 Explanation: For the purpose of his rule. (a) . . (b) a judicial proceeding shall be deemed to be instituted (i) in the case of a criminal proceedings on the date on which the complaint or report of the police officer on which the Magistrate takes cognizance is made; . ." There is no dispute that Punjab Civil Service Rules have been framed by the Governor in exercise of the power conferred on him by Article 309 of the Constitution and that Rule 2.2 occurs in chapter II of Volume II of the Rules dealing with "Ordinary Pension". It has been urged by the learned counsel for the appellant that keeping in view the scope of Article 309 as also the purpose of Rule 2.2	 the said rule cannot be interpreted to be a rule placing an embargo on prosecution of a government servant on the expiry of a period of four years from the date of cause of action or event mentioned therein. Having heard learned counsel for the parties	 we find substance in the submission made by learned counsel for the appellant. Article 309 empowers making of rules regulating the recruitment and conditions of service of persons appointed to public services and posts in connection with the affairs of the Union or any State. On the plain language of Article 309	 the proposition that any rule framed under this article has to be confined to recruitment and conditions of service of persons mentioned therein admits of no doubt. The rule in question certainly does not purport to regulate recruitment . The question which	 therefore	 presents itself for answer is whether the said rule if it is to be interpreted as one placing an embargo on institution of judicial proceedings as against a person referred to therein for prosecution in respect of a cause of action which arose or an event which took place more than four years before such institution	 as has been held by the High Court can be treated to be a rule regulating the condition of service of such a person. Learned counsel for the respondents asserts that the embargo aforesaid is a condition of service calculated to ensure a person mentioned in the said rule peace of mind after retirement. According to learned counsel for the respondent every employer wants his employee to be efficient and to achieve this object	 various incentives are given. Consequently	 according to learned counsel	 an assurance to an employee that he shall not be prosecuted after his retirement	 even though guilty of committing a grave misconduc or negligence during the PG NO 917 period of his service	 after the lapse of a particular time which has been fixed in the instant case as four years would fall within the purview of "conditions of service" as contemplated by Article 309. We find it difficult to agree with the submission. As explained by this Court in State of Madhya Pradesh and Ors. vs Shardul Singh	 and reiterated in I.N. Subba Reddy vs Andhra University	 ; the expression "conditions of service" means all those conditions which regulate the holding of a post by a person right from the time of his appointment till his retirement and even beyond it	 in matters like pension etc. In the normal course what falls within the purview of the term "conditions of service" may be classified as salary or wages including subsistance allowance during suspension	 the periodical increments	 pay scale	 leave	 provident fund	 gratuity	 confirmation	 promotion	 seniority	 tenure or termination of service	 compulsory or premature retirement	 superannuation	 pension	 changing the age of superannuation	 deputation and disciplinary proceedings. Whether or not a government servant should be prosecuted for an offence committed by him obviously cannot be treated to be something pertaining to conditions of service. Making a provision that a government servant	 even if he is guilty of grave misconduct or negligence which constitutes an offence punishable either under the Penal Code or Prevention of Corruption Act or an analogous law should be granted immunity from such prosecution after the lapse of a particular period so as to provide incentive for efficient work would not only be against public policy but would also be counter productive. It is likely to be an incentive not for efficient work but for committing offences including embezzlement and misappropriation by some of them at the fag end of their tenure of service and making an effort that the offence is not detected within the period prescribed for launching prosecution or manipulating delay in the matter of launching prosecution. Further	 instances are not wanting where a government servant may escape prosecution at the initial stage for want of evidence but during the course of prosecution of some other person evidence may be led or material may be produced which establishes complicity and guilt of such government servant. By that time period prescribed	 if any	 for launching prosecution may have expired and in that event on account of such period having expired the government servant concerned would succeed in avoiding prosecution even though there may be sufficient evidence of an offence having been committed by him. Such a situation	 in our opinion	 cannot be created by framing a rule under Article 309 of the Constitution laying down an embargo on prosecution as a condition of service. PG NO 918 There is another cogent ground on account of which the submission that giving a government servant peace of mind after his retirement in his old age can be a good ground to grant him immunity from prosecution cannot be accepted. This would on the face of it be discriminatory and thus arbitrary inasmuch as if peace of mind in old age can be a good ground for immunity from prosecution for offences committed by a person	 there seems to be no reason why such immunity may not be available to all old persons and should be confined only to government servants. On the face of it	 the government servants cannot constitute a class by themselves so as to bring their cases within the purview of reasonable classification	 if the purpose of granting immunity from prosecution is ensuring peace of mind in old age. Even on a plain reading of Rule 2.2	 it is apparent that the intention of framing the said rule was not to grant immunity from prosecution to a government servant	 if the conditions mentioned the rein are satisfied. As seen above	 Rule 2.2 is in chapter II of the Punjab Civil Service Rules which deals with ordinary pension. There can be no manner of doubt that making provision with regard to pension falls within the purview of "conditions of service". The embargo on prosecution spelt out by the High Court is not to be found in the main rule 2.2 but in the third proviso to the said rule. It is the third proviso which enjoins that no judicial proceedings. if not instituted while the officer was in service	 whether before his retirement or during his re employment shall be instituted in respect of a cause of action which arose or an event which took place more than four years before such institution. The scope of a proviso is well settled. In M/s Ram Narain Sons Ltd. vs Asst. Commissioner of Sales Tax and others	 [1955]2 SCR 483	 it was held: "It is a cardinal rule of interpretation that a proviso to a particular provision of statute only embraces the field which is covered by the main provision. It carves out an exception to the main provision to which it has been enacted as a proviso and to no other. " The same view was reiterated in Abdul Jabar Butt vs State of Jammu & Kashmir	 ; where it was held that a proviso must be considered with relation to the principle matter to which it stands as a proviso. PG NO 919 With regard to scope of a proviso	 it was urged by the learned counsel for the respondents relying on the decision of this Court in Ishverlal Thakorelal Almaula vs Motibhai Nagjibhai	 [1966] 1 SCR 367 that even though the proper function of a proviso is to except or qualify something enacted in the substantive clause which but for the proviso would be within that clause	 there is no rule that the proviso must always be restricted to the ambit of the main enactment. It may at times amount to a substantive provision. This submission too does not advance the case of the respondent inasmuch as even if in a given case a proviso may amount to a substantive provision	 making of such a substantive provision will have to be within the framework of Article 309. If a rule containing an absolute or general embargo on prosecution of a government servant after his retirement for grave misconduct or negligence during the course of the service does not fall within the purview of laying down conditions of service under Article 309	 such a provision cannot in the purported exercise of power under Article 309 be made by either incorporating it in the substantive clause of a rule or in the proviso thereto. In view of what has been said above and keeping in mind the scope of rule making power under Article 309 of the Constitution	 the third proviso to Rule 2.2 cannot be interpreted as laying down an absolute or general embargo on prosecution of government servant if the conditions stated therein are satisfied. Even if on first impression the said rule may appear to be placing such an embargo it has to be interpreted by taking recourse to the well settled rule of reading down a provision so as to bring	 it within the framework of its source of power without	 of course	 frustrating the purpose for which such provision was made. Clause (b) of Rule 2.2 which can be called the substantive clause reserves to the government the right of withholding or withdrawing a pension or any part of it	 whether permanently or for a specified period and the right of ordering the recovery from a pension of the whole or part of any pecuniary loss caused to Govt. if	 in a departmental or judicial proceeding	 the pensioner is found guilty of grave misconduct or negligence during the period of his service	 including service rendered upon re employment after retirement. The purpose of the third proviso thereto is	 as is the scope of a proviso	 to carve out an exception to the right conferred on the government by the substantive clause if the conditions contemplated by the proviso are fulfilled. This purpose can be achieved if the said proviso by adopting the rule of reading down is interpreted to mean that even if a government servant is prosecuted and punished in judicial proceedings instituted in respect of cause of action which arose or an event which took place more than four years PG NO 920 before such institution the government will not be entitled to exercise the right conferred on it by the substantive provision contained in clause (b) with regard to pension of such a government servant. The word "Such" in the beginning of the third proviso also supports this interpretation. At this place	 it may be pointed out that an analogous provision contained in Article 351 A of the Madras Pension Code came up for consideration before the Madras High Court in P. V. Venkatavardan vs The State of Tamil Nadu by the Deputy Superintendent of Police	 Vigilance and Anti corruption	 Vellore	 [1979] 23 MLJ (Crl) 275. Article 35 1 A in so far as it is relevant for the purpose of this case is reproduced hereunder: 351 A. Government further reserve to themselves the right of withholding or withdrawing a pension or any part of it	 whether permanently or for a specified period and the right of ordering the recovery from a pension of the whole or part of any pecuniary loss caused to Government	 if	 in a departmental or judicial proceeding	 the pensioner is found guilty of grave misconduct or negligence during the period of his service	 including service rendered upon re employment after retirement: Provided that: (a). . (b). . (c) no such judicial proceeding	 if not instituted while the officer was in service	 whether before his retirement or during his re employment shall be instituted in respect of a cause of action which arose or an event which took place more than four years before such institution; . A similar submission as has been made by the learned counsel for the respondents in the instant cases was made in the case of Venkatavardan	 (supra) also. section Natarajan	 J. as his Lordship then was repelled the submission and held: "The other point urged was that as per Article 351 A of the Madras Pension Code	 the right of the Government to PG NO 921 withhold the pension of a Government sevant will not cover events of grave misconduct or negligence committed by the government servant more than four years prior to the institution of the departmental proceedings. As the offences alleged to have been committed by the petitioner are referable to the years 1968 and 1969	 the petitioner contends	 the filing of a charge sheet on 5th December	 1973 against him was beyond the period of four years contemplated under Article 351 A of the Madras Pension Code and	 therefore	 the proceedings were vitiated. Even this contention must fail	 for	 a prosecution under section 161 and/or section 165	 Indian Penal Code	 read with section 5(1)(a) and 5(2) of the Prevention of Corruption Act	 is not controlled or restricted or trammelled in any manner by the Madras Pension Code. The provisions of the Pension Codemay	 if at all	 be relied on only for safeguarding the pension and cannot be pressed into service to defeat a prosecution on the threshold itself. " The decision of this Court in State of Punjab vs Charan Singh	 ; also throws some light on the principle involved in the instant cases. In that case Rule 16.38 of the Punjab Police Rules 1934 came up for consideration. The Punjab Police Rules laid down the procedure to be followed in imposing punishment on a Police Officer found guilty of misconduct or a criminal offence and made an exhaustive provision for departmental inquiries. Rule i6.38 laid down the guidelines to be followed by the Superintendent of Police in dealing with a complaint about the commission of a criminal offence by a police officer in connection with his official relations with the public. The respondent Charan Singh in that case was a police officer and was convicted and sentenced of an offence under section 5(1)(d) read with section 5(2) of the Prevention of Corruption Act. His conviction as well as sentence was set aside and he was acquitted by the High Court on the ground that there was non compliance with the provisions of Rule 16.38. Setting aside the order of acquittal and remanding the case to the High Court for fresh disposal in accordance with law	 this Court held that Rule 16.38 was not designed to be a condition precedent to the launching of a prosecution in a Criminal Court; it was in the nature of instructions to the Department and was not meant to be of the nature of sanction or permission for a prosecution	 nor could it overrid the provisions of the Code of Criminal Procedure and the Prevention of Corruption Act. PG NO 922 We may also point out that the correctness of the judgment of the High Court of Punjab and Haryana in the case of Des Raj Singhal	 (supra)	 relying upon which the orders appealed against in the instant cases have been passed	 was challenged by the State of Punjab in this Court in Criminal Appeal No. 40 of 1987. The question of law raised in the appeal was	 however	 not gone into and was left open to be decided in an appropriate case inasmuch as this Court on the facts of that case	 in its order dated April 15	 1987 took the view that it would be a futile exercise to consider the question of law involved in the appeal for the reason that the respondent had retired as long as on December 13	 1979. We now proceed to consider the other submissions made by learned counsel for the respondents. It was urged that since government had the power to make suitable amendments even retrospectively in Rule 2.2 of the Punjab Civil Service Rules in order to bring home its intention	 it was not open to it to challenge the validity of Rule 2.2. Suffice it to say	 so far as this submission is concerned that the purpose of the State of Punjab in filing these appeals is really to get the interpretation made by the High Court of Rule 2.2 reversed and to have the interpretation made by the Trial Court in the case of Des Raj Singhal	 (supra) restored and not to get the said rule declared ultra vires. It was also urged by the learned counsel for the respondents that the third proviso to clause (b) of Rule 2.2 as for the benefit of a government servant and virtually incorporates the principle underlying Article 21 of the Constitution by fixing four years as the limit for initiating prosecution. In support of the submission reliance was placed on a full bench decision of the Patna High Court in Madhesh wardhari Singh and Another vs State of Bihar	 AIR 1986 Patna Vol. In that case	 it was held that in all criminal prosecutions the right to a speedy public trial is now an inalienable fundamental right of the citizen under Article 21 of the Constitution and it extends to all criminal proceedings for all offences generically irrespective of their nature. It was also held that giving effect to fundamental right of a speedy public trial	 therefore	 would not in any way conflict with the provisions of the Code of Criminal Procedure and that unless the fundamental right to speedy trial is to be whittled down into a mere pious wish	 its enforceability in Court must at least be indicated by an outer limit to which an investigation and the trial in a criminal prosecution may ordinarily extend. PG NO 923 We are informed that special leave has been granted by this Court against the aforesaid judgment and its correctness is thus sub judice. That apart	 even if the soundness of the principle that there should be speedy trial may not be disputed	 the said principle cannot be invoked by the respondents in support of their interpretation of the third proviso to clause (b) of Rule 2.2 framed under Article 309 of the Constitution whose purpose	 as already indicated above	 is not to place an embargo on prosecution. It is always open to quash a prosecution on the ground of unexplained unconscionable delay in investigation and prosecution on the facts of a given case. It was then urged by the learned counsel for the respondents that the third proviso to clause (b) of Rule 2.2 is in the nature of a beneficent legislation and in case of doubt has to be interpreted in favour of the person for whose benefit the Rule has been framed. In our opinion	 keeping in view the scope of the power to frame a rule under Article 309 and the purpose of Rule 2.2	 there is no doubt with regard to the interpretation of the said rule. By applying the rule of interpretation with regard to a beneficent legislation	 a benefit never intended to be conferred cannot be conferred. Learned counsel for the respondents also submitted that the State enjoys plenary power in the matter of prosecution for an offence and if the Government in its wisdom thought it fit that a government servant after his retirement should not be be prosecuted for grave misconduct of action arose or the incident took place more than your years before the institution of judicial proceedings for prosecution	 no exception can be taken to that power. In this connection	 apart form relying on various sections of the Code of Criminal Procedure such as sections 197	321	432	433 and 468 and the power of the Governor to grant pardon	 learned counsel for the respondents also relied on Harold J. Laski 's "A Girammar Of Politics" for the proposition that every government has a power to decide not to prosecute or prosecution having been commenced to decide upon its discontinuance. We are of opinion that this submission too does not help the respondents in these appeals for the simple reason that the third proviso to clause (b) of Rule 2.2 has not been framed for that purpose but has been framed for a different purpose namely to provide an exception to the power of the government in the matter of withholding or withdrawing etc. of pension of a retired government servant contained in clause (b) of Rule 2.2. PG NO 924 Lastely	 it was urged by learned counsel for the respondents in these appeals that on the same principle on which criminal appeal No. 40 of 1987 in the matter of Des Raj Singhal	 was dismissed these appeals also deserve to be dismissed. So far as this submission is concerned	 we find substance as regards the appeal against Kailash Nath. The First Information Report in this case was lodged on 27th August	 1985	 that is	 after about six years of the accrual of the cause of action or taking place of the events which took place in 1979 and after about three years even from 3 1st October 1982 when the respondent retired from service. Now in 1988 it would be pursuing a stale matter. In this view of the matter	 we are of the opinion that the order of the High Court quashing the First Information Report as against Kailash Nath	 respondent in criminal appeal No. 422 of 1988	 deserves to be maintained though on a different ground. The facts of the case	 with regard to Mangal Singh Minhas	 respondent in Criminal Appeal Nos. 423 24 of 1988	 however	 are different. In this case	 as seen above	 First Information Report was promptly lodged on June 19	 1980. The filing of challan	 however	 was delayed on account of the steps taken by the respondent for getting the First Information Report quashed. He retired about three years after lodging of the First Information Report and during the pendency of the proceedings in the High Court for quashing of the said First Information Report. Since the High Court quashed the prosecution of Mangal Singh Minhas on one ground alone based on its earlier decision in the case of Des Raj singhal and did not consider other grounds	 if any	 that may have been raised by him for quashing of the prosecution	 we are of the opinion that after setting aside the orders appealed against in this case	 the High Court should be required to decide afresh the petition mde by Mangal Singh Minhas for quashing of the prosecution on grounds	 if any	 other than those which have already been considered above. In view of the foregoing discussion	 Criminal Appeal No. 422 of 1988 as against Kailash Nath is dismissed and the order quashing the First Information Report in his case is maintained even though on another ground; whereas Criminal Appeal Nos. 423 24 of 1988 as against Mangal Singh Minhas are allowed and the orders appealed against passed by the High Court as set aside. The High Court shall however	 decide the petition made by Mangal Singh Minhas afresh in accordance with law in the light of the observations made above. R.S.S. Crl. A No. 422/88 is dismissed and Crl. A Nos. 423 24/88 is allowed.

On the basis of a vigilance enquiry against Kailash Nath	 respondent	 pertaining to the purchase of sign boards by him while working as Executive Engineer in the State Public Works Department	 a First Information Report was lodged against him in August 1985. The respondent challenged the F.I.R. in the High Court on the ground that the same having been lodged about three years after his retirement in October 1982 and about six years after the event of purchase in 1979. was in the teeth of proviso (3) to Rule 2.2(b) of the Punjab Civil Service Rules	 Volume II	 which provided that no judicial proceedings if not instituted while the officer was in service	 shall be instituted in respect of a cause of action which arose or an event which took place more than four years before such institution. The same ground was taken by Mangal Singh Minhas	 respondent	 when a challan was filed against him. The High Court	 relying on its earlier decision	 quashed the First Information Report and the challan. Dismissing the State appeal against Kailash Nath and allowing it against Mangal Singh Minhas	 this Court	 HELD: (1) Any rule framed under Article 309 has to be confined to recruitment and conditions of service of persons mentioned therein.[916E] (2) The expression "conditions of service" means all those conditions which regulate the holding of a post by a person right from the time of his appointment till his retirement and even beyond it	in matters like pension etc. PG NO 911 PG NO 912 (3) Rule 2.2. is in Chapter II of the Punjab Civil Service Rules which deals with ordinary pension. There can be no manner of doubt that making provision with regard to pension falls within the purview of "conditions of service". [918D] (4) Whether or not a government servant should be prosecuted for an offence committed by him obviously cannot be treated to be something pertaining to conditions of service. [917D] (5) Even on a plain reading of Rule 2.2	 it is apparent that the intention of framing the said rule was not to grant immunity from prosecution to a government servant	 if the conditions mentioned therein are satisfied. [918C] (6) Making a provision that a government servant	 even if he is guilty of grave misconduct or negligence which constitutes an offencepunishable either under the Penal Code or Prevention of Corruption Act or an analogous law should be granted immunity from such prosecution after the lapse of a particular period so as to provide incentive for efficient work would not only be against public policy but would also be counter productive. [917D E] (7) On the face of it	 the government servants cannot constitute a class by themselves so as to bring their case within the purview of reasonable classification	 if the purpose of granting immunity from prosecution is ensuring peace of mind in old age. [918B] (8) Even if in a given case a proviso may amount to a substantive provision	 making of such a substantive provision	 will have to be within the framework of Article 309. If a rule containing an absolute or general embargo on prosecution of a government servant after his retirement for grave misconduct or negligence during the course of his service does not fall within the purview of laying down conditions of service under Article 309	 such a provision cannot in the purported exercise of power under Article 309 be made by either incorporating it in the substantive clause of a rule or in the proviso thereto. [919C D] (9) Even if on first impression Rule 2.2 may appear to be placing an embargo on prosecution it has to be interpreted by taking recourse to the well settled rule of reading down a provision so as to bring it within the framework of its source of power	 without	 of course frustrating the purpose for which such provision was made. This purpose can be achieved if the said proviso by adopting the rule of reading down is interpreted to mean that even if PG NO 913 a government servant is prosecuted and punished in judicial proceedings instituted in respect of cause of action which arose or an event which took place more than four years before such institution the government will not be entitled to exercise the right conferred on it by the substantive provision contained in clause (b) with regard to pension of such a government servant. The word "such" in the beginning of the third proviso also supports this interpretation. [919D H;920A] (10) By applying the role of interpretation with regard to a beneficent legislation	 a benefit never intended to be conferred cannot be conferred. [923D] (11) It is always open to quash a prosecution on the ground of unexplained unconscionable delay in investigation and prosecution on the facts of a given case. In this view of the matter. the appeal against Kailash Nath is dismissed whereas the appeals against Mangal Singh Minhas are allowed. [924F] Des Raj Singhal vs State of Punjab	 ; State of Madhya Pradesh & Ors. vs Shardul Singh	 ; I.N. Subba Reddy vs Andhra University	 ; ; M/s. Ram Narain Sons Ltd. vs Asstt. Commissioner of Sales Tax and Others	 ; ; Abdul Jabar Butt vs State of Jammu & Kashmir	 ; ; Ishverlal Thanorelal Almaule vs Motibhai Nagjibhai [1966] 1 SCR 367; P.P. Venkatavardan vs The State of Tamil Nadu by the Deputy Superintendent of Police	 Vigilance and Anti corruption Vellore	 [1979] 23 MLJ (Crl.) 275; State of Punjab vs Charan Singh	 ; ; Madhashwardhari Singh and Another vs State of Bihar	 AIR (1986) Patna (Vol.73) page 324	 referred to.