I.A. Ansari, J.

1. All these appeals, having arisen out of a common judgment and order, dated 03.06.2010, passed in W.P. (C) 171 (AP)/2009, have been heard together and are being disposed of by this common judgment and order. The Recruitment Rules of 1973 (in short, the 1973 Rules') to Class-III (Non-Gazetted) Teachers' posts in the Directorate of Education, Arunachal Pradesh Administration, provide for appointment of Graduate Teachers, Class-III (Non-Gazetted) and also Senior (Post-Graduate) Teachers, Class-III (Non-Gazetted). The 1973 Rules were framed under the proviso to Article 309 of the Constitution of India and came into force on 29.12.1973.

2. Rule 4 of the 1973 Rules prescribes the method of recruitment. As per this Rule, 50% of the sanctioned strength of Post-Graduate Teachers has to be filled up by direct recruitment and the remaining 50% posts of Post-Graduate Teachers by promotion, on the basis of seniority-cum-merit, from amongst the Graduate Teachers, who have put in three years of continuous service as Graduate Teachers.

3.. Following the 1973 Rules, the Recruitment Rules, 1983, to (Central Civil Services)' (Group 'B') posts under the Department of Education/G