The petitioners in Representation Petition 595 of 1977 prayed in these circumstances for quashing the revised seniority list issued by the first respondent State of Andhra Pradesh on 27.12.1976 so far as they are concerned and for restoration of their old seniority as per the earlier seniority list of 1974 or in the alternative for declaring that Rule 13 (1) of the Adhoc Rules, 1973 dealing with seniority of Junior Lecturers is violative of Articles 14 and 16 of the Constitution Rule 13 (ll and (2) of the Adhoc Rules framed by the Government under Article 309 of the Constitution read as follows: "Rule 13 (1) The seniority of a person appointed under clauses (i) and (ii) of sub rule (l) of Rule 3 shall be 551 determined with reference to the date of his actual appointment as a Post Graduate Assistant of the.