Summarize the following court judgment. Civil Appeal No. 1995 of 1977. From the Judgment and order dated 16.9.1975 of the Andhra Pradesh High Court in Writ Petition No. 584 of 1975 . G.L. Sanghi	 Subodh Markandeya and Mrs. Chitra Markandeya for the Appellants. K.G. Bhagat	 Y. Prabhakar Rao	 T.V.S.N. Chari and Ms. Vrinda Grover for the Respondents. The Judgment of the Court was delivered by RANGANATH MISRA	 J. This appeal is by special leave and is directed against the appellate judgment of a division bench of the Andhra Pradesh High Court upholding the rejection of the writ petition 26 by a Single Judge of that High Court. Appellants are Engineers in the establishment of the Chief Engineer (Roads and Buildings of the Andhra Pradesh Government and the dispute is one of inter se seniority between them on the one side and respondents 3 and 4 on the other. Appellants filed a writ petition being No. 4151 of 1972 in the High Court of Andhra Pradesh claiming a direction to the State Government for considering them for promotion to the post of Executive Engineer on the basis that they were senior to five promotee Assistant Engineers. A learned Single Judge disposed of the said writ petition by judgment dated 29th March	 1973	 and gave the following directions: "The respondents 1 and 2 (State of Andhra Pradesh and its Chief Engineer respectively) will	 therefore	 consider the claims of the petitioners for promotion as Executive Engineers having regard to their seniority in the cadre of Assistant Engineers in relation to the seniority of respondents 3 to 7. I	 therefore	 direct respondents 1 and 2 to take the seniority of the petitioners	 who were full members of service	 in relation to the seniority of respondents 3 to 7 in the cadre of Assistant Engineers and consider the case of the petitioners for promotion to the posts of Executive Engineers in accordance with the rules. " The State Government	 in compliance with the directions issued to it	 by order dated 10th August	 1983	 made an order stating: "As per Rule 5 of the said Special Rules	 for promotion to the post of Executive Engineers (ordinary Grade) a Graduate Assistant Engineer should be: (a) a full member or approved probationer; (b) a direct recruit should put in six years service as Assistant Engineer; and (c) a promotee Assistant Engineer should put in five years service. No preference is provided for persons	 who were either direct recruit Assistant Engineers or who secured earlier confirmation. In the absence of specific provision in the 27 Special Rules for giving any preference to direct recruit Assistant Engineers in the matter of promotion to the category of Executive Engineers	 only the provisions of General Rules for State and Subordinate Services have to be applied therefor. According to Rule 33(a) of General Rules for Andhra Pradesh State and Subordinate Services	 the seniority of a person in a service	 class	 category or grade	 shall	 unless he has been reduced to a lower rank as a punishment	 be determined by the date of first appointment to such service	 class	 category or grade. So	 the seniority of the Writ Petitioners and the respondents has to be considered with reference to their dates of regular appointment to the category of Assistant Engineers (R & B) but not from the date of confirmation in the said category	 for purpose of promotion as Executive Engineers. The dates of commencement of probation of the respondents and Writ Petitioners is as indicated below: Sl. Name of the Asstt. Date of Comm No. Engineer encement of probation ___________________________________________________________ Respondents 1. B.V. Venkataramana 19.5.1961 2. C.M. Ramachandramurthy 19.5.1961 Writ Petitioners 1. Desoola Rama Rao 18.7.1966 2. V. Murahari Reddy 30.6.1966 ___________________________________________________________ (Names of the three others stated in the order are not extracted as are not relevant). Thus the respondents commenced their probation between 1959 to 1963 while the writ petitioners commenced their probation in 1966 and their seniority is far below the respondents. The Government	 after careful examination of the judgment of the High Court	 with reference to the statutory rules and in relation to the seniority obtaining between the respondents and the writ petitioners	 decide that the 28 turn of the two writ petitioners for promotion has not yet come and that their claims shall be considered for promotion as Executive Engineers (ordinary Grade) in their turn	 along with others according to their seniority as per rules and eligibility. " The appellants thereafter filed a second writ petition being Writ Petition No. 6157 of 1973 before the High Court challenging the Government order. As already stated	 the learned Single Judge has dismissed the writ petition and such dismissal has been upheld in appeal. Appellants were directly recruited as Assistant Engineers on 29th April	 1966 and Special Rules for Roads and Buildings Division of the public Works Department were made on 27th June	 1967	 but were given effect from 1st April	 1965. According to the Rules	 appointment to the posts of Assistant Engineers can either be by direct recruitment or by recruitment by transfer of Junior Engineers and Supervisors or Draftsmen (Special Grade) or Draftsmen (Grade I) Under the Rules	 appellants became eligible for promotion to the post of Executive Engineer in 1971 and when their claim for promotion was overlooked the first writ petition	 as already stated	 was filed. According to the appellants	 respondents 3 and 4 were appointed by transfer under Rule 10 A of the Rules and were approved probationers. They contend that the promotees are approved probationers and until confirmation as full members of the service	 they would not be entitled to the benefit of seniority in service and	 therefore	 the appellants were senior to them. They	 therefore	 challenged the Government order referred to above and contended that the High Court went wrong in not holding that appellants were senior to the two respondents and on that basis they were entitled to consideration for promotion to the post of Executive Engineer in preference to those respondents. There is no dispute that both directly recruited Assistant Engineers as also promotee Assistant Engineers are entitled to promotion as Executive Engineers. The rule requires direct recruits to have put in six years of service while for promotees the prescription is five years of service for being eligible to be considered for promotion. As in many other service rules	 there is no provision in the Rules under consideration that direct recruits would have preference over promotees for purposes of inter se seniority. In the absence of such a rule the High Court followed the guideline indicated in the General Rules which provides that seniority shall be determined by the date of first appointment to the service. The High Court found that respondents 3 29 and 4 came to serve as Assistant Engineers long before the appellants were recruited as Assistant Engineers. In fact in paragraph 6 of his judgment	 the learned Single Judge in the second writ petition has indicated that respondents 3 and 4 were temporarily appointed as Assistant Engineers on 14th August	 1959 and 19th May	 1960 respectively. In exercise of power under Rule 23(a) of the General Rules	 the services of the two respondents had been regularised retrospectively with effect from 19th May	 1961 and the order of regularisation had been passed by the Chief Engineer on 3rd May	 1967. In the instant case the date from which regularisation has been directed to take effect is not anterior to their appointment as Assistant Engineers. That being the position	 regularisation is not vitiated on account of arbitrariness. The only other aspect argued on this score was that the Chief Engineer was not competent to make the order. Rule 23(a) of the Andhra Pradesh State and Subordinate Services Rules provides: "If a person	 having been appointed temporarily under sub rule (a) or sub rule(c) of rule 10 to post borne on the cadre of any service	 class or category or having been appointed to any service	 class or category otherwise than in accordance with the rules governing appointment thereto is subsequently appointed to any service	 class or category in accordance with the rules	 he shall commence his probation from the date of such subsequent appointment or from such earlier date as the appointing authority may determine." (Underlining is ours) The vires of this rule had not been challenged but the only contention in this regard was that the appointing authority being the State Government	 the Chief Engineer should not have made the order fixing the date of commencement of probation. It is the case of the respondents that the State Government has delegated that power to the Chief Engineer and the order of delegation of that power is on record. The law relating to inter se seniority in a cadre is well settled. If there be a rule indicating the manner in which such seniority has to be fixed	 that is binding. In the absence of such a rule	 length of service is the basis for fixing inter se seniority. The High Court has found	 and there is no longer any dispute	 that respondents 3 and 4 have put in longer service than the appellants in the post of Assistant Engineer. In that view of the matter	 the State Government was right	 and the High 30 Court appropriately approved it	 that the appellants would rank below the respondents 3 and 4 in the cadre and the promotional benefit would be given to them after the claim of the respondents 3 and 4 has been duly considered. We see no merit in the appeal. It is accordingly dismissed. There would be no order for costs. P.S.S. Appeal dismissed.

% Rule 5 of the Andhra Pradesh (Roads and Buildings) Engineering Service Special Rules	 1967 lays down that for promotion to the post of Executive Engineer	 a Graduate Assistant Engineer should be (a) a full member or approved probationer	 (b) a direct recruit should put in six years service as Assistant Engineer and (c) a promotee Assistant Engineer should put in five years service. There is no provision for giving preference to one category over the other for promotion. Rule 23(a) of the Andhra Pradesh State and Subordinate Service Rules	 1962 empowers the appointing authority to commence the probation of a person appointed to the service with retrospective effect. Rule 33(a) of these rules mandates the determination of the seniority of a person in a service by the date of first appointment. The appellants were directly recruited as Assistant Engineers in April 1966. Respondents 3 and 4 were temporarily appointed Assistant Engineers by transfer on 14th August	 1959 and 19th May	 1960 respectively. Their services were regularised with effect from 19th May	 1961 by an order dated 3rd May	1967 in exercise of the powers under section 23(a) of the General Rules. The appellants sought promotion to the post of Executive Engineer on the basis that they were senior to the promotee Assistant Engineers respondents. Their case was that the Chief Engineer was hot competent to make the order under s.23(a) of the General Rules. The State Government vide their order dated August 10	 1983 decided that the seniority of the direct recruits and promotees has to be determined with reference to their regular appointment of the category of Assistant Engineers and not from the date of confirmation in the said category and declared that the seniority of the appellants was far below the respondents and they would be considered for promotion in their turn alongwith others. 25 A writ petition filed by the appellants in the High Court challenging the said order was dismissed by a Single Judge	 and that dismissal was upheld in appeal. Dismissing the appeal by special leave	 ^ HELD: The law relating to inter se seniority in a cadre is well settled. If there be a rule indicating the manner in which such seniority has to be fixed	 that is binding. In the absence of such a rule	 length of service is the basis for fixing Inter se seniority. In the instant case	 there is no provision in the Rules under consideration that direct recruits would have preference over promotees for purposes of inter se seniority. In the absence of such a rule the guidelines indicated in the General Rules	 which provide that seniority shall be determined by the date of first appointment to the service	 have to be followed. Respondents 3 and 4 have put in longer service than the appellants in the post of Assistant Engineer. Their services had been regularised with effect from May 19	 1961 in exercise of the powers under Rule 23(a) of the General Rules	 which date is not anterior to their appointment as Assistant Engineer. The regularisation is thus not vitiated on account of arbitrariness. The appellants would	 therefore	 rank below respondents 3 and 4 in the cadre and the promotional benefit would be given to them after the claim of the respondents 3 and 4 has been duly considered.