Summarize the following court judgment. Petition (Civil No. 651 of 1986. (Under Article 32 of the Constitution of India). P.P. Rao	 Ms. Bina Gupta	 Ms. Vandana Saggar and Ms. Monika Mohil for the Petitioners. V.C. Mahajan	 K. Swamy	 Ms. A. Subhashini and Ms. Niran jana Singh for the Respondents. The Judgment of the Court was delivered by KULDIP SINGH	 J. This petition under Article 32 of the Costitution has been filed by Prahalad Singh claiming that he and other similarly placed Compositors working in the Government of India Presses all over India are entitled to the status and salary of Compositors	 Grade I in the "highly skilled" category with effect from January 1	 1966	 The said relief is claimed on the sole ground that one T.R. Thakur has already been given Grade I in the "highly skilled" category as a result of the judgment in his favour given by the Himachal Pradesh High Court. The writ petition (C.W. 61/69) filed by T.R. Thakur was allowed by the learned Single Judge of the High Court on May 21	1971 and Letters Patent Appeal against the said judgment was dismissed on May 9	 1979. The High Court held that the categorisation as "highly skilled" and "skilled" on the basis of seniority alone was unreasonable and discriminatory. No special leave 154 petition against the judgment of the High Court was brought to this Court and as such the judgment has become final. Prahalad Singh and others have claimed that they are entitled to the benefit of the judgment given by the High Court in Thakur 's case. According to them the said judgment is applicable in principle to all the Compositors whether they were parties before the High Court or not. This peti tion came for hearing before a Bench of this Court consist ing of R.S. Pathak	 CJI	 M.N. Venkatachalia	 J. The Bench in its order dated April 28	 1989 observed as under : "The principal objection to the grant of relief to the Petitioner and those for whom he claims to act is the gross delay with which the writ petition appears to have been bought in this Court. To surmount that difficulty the petitioner relies upon the plea that the judgment of the High Court in T.R. Thakur 's case is a judgment operative in principle in favour of all compositors situated in the circumstances in which T.R. Thakur found himself. There are other pleas which have been taken by the petitioner	 but the substantial one is whether he and the other compositors can enforce in their favour the benefit grant ed in T.R. Thakur 's case although they were not parties to that proceeding. At first blush it would seem that the High Court considered the particular facts of T.R. Thakur	 the petitioner before it	 and while granting relief it appears	 in terms	 to have confined it to T.R. Thakur. It is an important point whether	 as the petitioner now contends before us	 the direction issued by the High Court can be regarded as a direction operative in re spect of all compositors employed in the Government of India Presses all over India	 The point is important since the objection on the plea of laches seems to be a substantial one in view of the several compositors who have over the years been promoted to the category of "highly skilled" compositors	 and interfering with their status now could mate rially prejudice them. At the same time	 it cannot be doubted that there can be cases where although the facts of a particular petitioner have been taken into consideration what the Court indents	 when it adjudicates on the claim	 is to lay down the law to be ap plied by the respondents to all similar situa tions. There are other cases where relief may be granted or refused upon the consideration of a question involved the question being one which affects several persons of the category to which the petitioner belongs and the grant or refusal of the relief may turn on 155 the particular facts of that case. Various possible categories of cases can be conceived in this context. We think it desirable that in cases such as this the Court should formulate a set of appropriate guidelines indicating when directions rendered by the Court in one particular case can be regarded as operative in other cases. As the matter will be governed both by principle and by the practice of the Court	 it is appropriate that this case be referred to a larger Bench for consideration on this and the other points arising in it. " This is how the writ petition has come before us for final heating. It is not necessary to go into the merits of the question posed by the Two Judges Bench of this court because we are of the view that the High Court judgment in Thakur 's case does not lay down the correct law. The facts which led 'to the filing of the writ petition by Thakur are as under: Prior to January 1	 1966	 there was one grade of Compos itors (Rs. 110 Rs. 180) in the Government of India Presses. In the year 1963 a committee called "The Committee for Categorisation of the Government of India Press Workers" was constituted to review the classification of posts of indus trial workers in the Government of India printing presses. The said Committee	 inter alia	 made the following recommen dations : "There was an equally persistent and wide spread demand from the workers that the cate gory of Compositors should be treated as highly skilled instead of skilled as at present. We have very carefully examined this case as well and were unable to subscribe to this demand. Hand composing in the Govt. of India presses is essentially a skilled job. The Managers were	 however	 of the opinion that 10 15% of the Compositors are frequently expected to handle composition work of mathe matical or scientific discourses. For this	 a knowledge application of diacritical marks superior and inferior letters/figures	 scien tific signs/symbols etc. are essential. This work	 admittedly	 involved much higher skill than originally hand composition. The Commit tee	therefore	 recommend that a suitable percentage of compositors should be upgraded to the highly skilled category with pay scale of Rs. 175 205. This category should be given an appropriate designation to distinguish it from the ordinary grade of Compositors who should still be in the skilled group. " 156 Accepting the above recommendations	 the Government of India	 by an order dated March 14	 1966	 divided the exist ing cadre of Compositors Compositors Grade I (Rs. 150 Rs. 206) and Compositors Grade II (Rs. 11 O 180). It was further decided that the Compositors Grade I would be classified as "highly skilled" and Compositors Grade II as "skilled". The ratio of Grade I to Grade II was fixed as 20: 80. The initial constitution of the cadre of Compositors Grade I was done by appointing 20% of the Compositors on the basis of seniority cure fitness but trade test was made obligatory for future promotions to Grade I. While implementing the above said decision of the Gov ernment of India	 18 Compositors who were senior to Thakur were given the pay scale of Compositor Grade I. Thakur challenged the denial of higher pay scale of Compositor Grade I to him on the ground that he and the 18 Compositors who were promoted were performing the same duties and were holding similar posts which were inter changeable. According to him all of them were performing the duties of "highly skilled" Compositors and as such the higher grade could not have been denied to him. The learned Single Judge allowed the writ petition and held that the categorisation of the senior most persons as "highly skilled" was arbitrary and discriminatory. The learned Judge issued the following directions: "In the light of the above I am of the view that the petitioner is entitled to the relief prayed for and direction is issued to the respondents not to enforce the revised scale of pay in such a manner as to subject the petitioner to a lower scale of pay than the one allowed to the compositors who have been so fixed in the scale laid down for the highly skill compositors. " The Letters Patent Appeal filed by the Union of India against the judgment of the learned Single Judge was dis missed by the Division Bench of the High Court on the fol lowing reasoning: "The contention of the appellants	 as raised by them in paragraph 5 of their return. that by length of service a person acquires more and more skill and	 therefore	 the test of seniority for the purpose of putting a person in the higher category of Grade I was justi fied	 not acceptable because it is very well known that a mere length of service does not always result in more skill in the working of the person concerned. Seniority would have of course relevance in a situation where two persons having equal skill are to be consid ered. But unless such a situation arose it is very much evident that initial placing of the 157 present incumbents on the post of Compositor in the higher category of Grade I could not have been done in total disregard of the degree of skill which each of these incumbents possessed. " Academic pursuit and experience are two primary sources of learning. A Compositor 's job in a printing press is a skilled job requiring special technique. In such a job it would be reasonable to measure the standards of skill by length of experience. The High Court	 in our view	 fell into error in quash ing the classification based on experience arising out of length of service. It is obvious from the recommendations of the Committee quoted above that "highly skilled" category was created to handle the nature of work which involved higher skill than the original hand composition. The Com positors with longer service and who were found fit for promotion were appointed to Grade I and were categorised as "highly skilled". Experience itself is merit and can be a valid basis for classification. This Court in State of U. P. vs j. P. Chaurasaia; 	 has upheld the classifica tion based on experience as reasonable classi fication. Jagannatha Shetty	 J. speaking for this Court observed: "Article 14 permits reasonable classification founded on different bases. It is now well established that the classification can be based on some qualities or characteristics of persons grouped together and not in others who are left out. Those qualities or characteris tics must	 of course	 have a reasonable rela tion to the object sought to be achieved. In service matters	 merit or experience could be the proper basis for classification to promote efficiency in administration. He or she learns also by experience as much as by other means. It cannot be denied that the quality of work performed by persons of longer experience is superior than the work of newcomers. Even in Randhir Singh case	 this principle has been recognised. O. Chinnappa Reddy	 J. observed that the classification of officers into two grades with different scales of pay based either on academic qualification or experience or length of service is sustainable. Apart from that	 higher pay scale to avoid stagna tion or resultant frustration for lack of promotional avenues is very common in career service. There is selection grade for District Judges. 'there is senior time scale in Indian Administrative Service. There is supertime scale in other like services. The entitlement to these higher pay scales depends upon sen iority 158 cure merit or merit cure seniority. The dif ferentiation so made in the same cadre will not amount to discrimination. The classifica tion based on experience is a reasonable classification. It has a rational nexus with the object thereof. To hold otherwise	 it would be detrimental to the interest of the service itself. " We	 therefore	 hold that the judgment of the Himachal Pradesh High Court in T.R. Thakur 's case does not lay down correct law and is overruled. The only ground on which this petition is based	 having become non existent	 the petition ers are not entitled to the relief claimed by them and the writ petition is liable to be dismissed. We are	 however	 of the view that the cadre of Composi tors Grade I 'highly skilled ' should be enlarged. The Com positors are persistently demanding the upgrading of the whole of the cadre. The "Committee" also recommended that suitable percentage be upgraded. The Government created the higher grade for 20% of them. Keeping in view the large number of Compositors all over the country and to remove stagnation we are of the opinion that the ratio between the two cadres should be 33 1/3: 66 2/3%. We	 therefore	 commend to the respondents to increase the strength of the cadre of Compositor Grade I 'highly skilled ' to 33 1/3 per cent with effect from April 1	 1992. The writ petitions is disposed of in the above terms with no order as 0 costs. V.P.R. Petition dismissed.

Petitioner claiming that he and other similarly placed Compositors working in the Government of India presses all over India were entitled to the status and salary of Compos itors	 Grade I in the "highly skilled" category with effect from January 1	 1966 on the ground that the decision of the Himachal Pradesh High Court in Thakurs case was applicable in principle to all the Compositors	 filed the present petition under Article 32 of the Constitution. The High Court in Thakur 's case held that the categori sation as "highly skilled" and "skilled" on the basis of seniority alone was unreasonable and discriminatory. As no special leave petition against the judgment of the High Court was brought to this Court the judgment became final. Over ruling Thakur 's case and dismissing the petitions this Court	 HELD: I.Academic pursuit and experience are two primary sources of learning. A Compositor 's job in a printing press is a skilled job requiring special technique. In such a job it would be reasonable to measure the standards of skill by length of experience. The High Court fell into error in quashing the classification based on experience arising out of length of service. [157 B] 2. "Highly skilled" category was created to handle the nature work which involved higher skill than the original hand composition. The Compositors with longer service and who were found fit 153 for promotion were appointed to Grade I and were categorised as "highly skilled". Experience itself is merit and can be a valid basis for classification. [157 C D] 3. Keeping in view the large number of Compositors all over the country and to remove stagnation the ratio between the two cadres should be 33 1/3: 66 2/3 %. [158 D] 4. The respondents are directed to increase the strength of the cadre of Compositor Grade I 'highly skilled ' to 33 1/3 percent with effect from April 1	 1992. [158 D] Thakur 's Case (Writ petition C.W. No. 61/69) dated 21.5.1971; overruled. State of U.P.v. J.P. Chaurasia; 	 ; re ferred to.