No, you are not illegible for this post.
Minimum qualification(s):-
(1) Hons/P.G scale
(2) Minimum 5 years of teaching experience.
*** Have you applied for permission to your M.C.?
**** Did your school send the same to the D.I.?
***** Is the Hons/P.G degree the same with your appointment?
If all answer are yes, then you can apply to your D.I.for the POSTFACTO permission of those degree.