But the Tribunal relied heavily on the fact that the Andhra Pradesh High Court had directed in Writ Appeals 920 and 938 of 1975 that the seniority list should be prepared in accordance with Rule 13 (1) of the Adhoc Rules, 1973 which have been given retrospective effect from 1.8.1969 and held that the impugned seniority list framed as per Rule 13(1) of the Adhoc Rules having precedence over the earlier executive instruction is valid and that as the petitioners and respondents 3 to 8 belonged to the same category of Post Graduate Assistants, there is no question of violation of Articles 14 and 16 of the Constitution as Adhoc Rule 13 (1) says that seniority of Post 566 Graduate Assistants appointed as Junior Lecturers shall be determined with reference to the dates of their actual appointment as Post Graduate Assistants or the probable dates on which they would have been appointed as Post Graduate Assistants but for their appointment or promotion to higher posts.