Provided that no such person shall be senior to any person appointed under clause (i) or (ii) of sub rule (1) of Rule 3; Provided further that no person appointed under sub clause (b), sub clause (c) or clause (iii) of sub rule (I) of Rule 3 shall be senior to a person appointed under sub clause (a) of that clause. " Rule 3 of the Adhoc Rules, 1973 reads as follows: 4 "Rule 3 of Appointment: (1) Appointment to this class shall be made as follows: (i) First by appointment of Post Graduate Assistants in Category I A of Class II and Selection Grade Assistants in Grade I of Category 2 of Class II in the Andhra Pradesh Educational Sub ordinate Service or Headmasters of High Schools and Post Graduate Assistants in Zila Parishads High Schools and such of the Municipal Schools as are converted into Junior Colleges; (ii) Secondly, if there are no suitable and qualified persons available for appointment under clause (i) then by appointment of Trained Graduates a possessing Post Graduate Diploma in Physical Sciences in the scale of pay admissible to Post Graduate Assistants immediately before the commencement of these rules; (iii) Thirdly, if there are no suitable and qualified persons available for appointment under sub clause (i) or sub clause (ii) 552 (a) by recruitment from among the Headmasters and Post Graduate Assistants in recognised Multipurpose or Higher Secondary Schools under private management or under the management of the Municipality which are not converted into Junior Colleges; or (b) By transfer from School Assistants in Grade II or Category 2 in Class II and Pandits (including Hindi Pandits), Munshis Grade I in Category I of Class III of the Andhra Pradesh Educational Subordinate Service or by recruitment by transfer from any other service; or (c) by direct recruitment.