Brother, it was explicitly mentioned against the trade instructor post that candidate must have had DAE in the relevant field. It is like a post is advertised for which the required qualification is MBBS and a person raise objection that as he has P.hd in the subject so he should be allowed to avail the job. Whatsoever a person have the qualification until he does not hold the DAE( 3 years program), according to my interpretation of the advertisement, he is not eligible. I have Engineering degree. This did not make me eligible but the DAE made me eligible for the trade instructor post. I hope you have got the point.

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SHAH