Judgment

KOSHAL, J.:- By this judgment we shall dispose of Civil Appeals Nos. 3520 to 3524 of 1979 which are directed against a common judgment dated 11-9-1979 of a Division Bench of the High Court of Kerala holding that in the Department of Education of the State of Kerala the post of Assistant Educational Officer (hereinafter described as A. E. O.) is not a promotion post vis-a-vis that of a High School Assistant (hereinafter referred to as H. S. A.), that the two posts are interchangeable and that consequently the reversion of the solitary appellant in each case from the post of A. E. O. to that of H. S. A. is not violative of Article 16 of the Constitution.

2. It is not disputed before us that each of the appellants had been holding the post of A. E. O. for more than six years continuously when his reversion was ordered in implementation of the instructions issued by the State Government through a letter dated the 19th May, 1977 to the effect that every A. E. O. should be transferred back as H. S. A. after six years of service as A. E. O. or even earlier on administrative grounds. Each reversion was challenged before the Kerala High Court by means of a petition under Article 226