LTC endorsed or not in Directorate of Education ,Delhi

This is an enquiry regarding the encashment of Earned Leave for availing LTC as per the DOPT letter - F. No. 31011/4/2008. Estt.(A), which was duly endorsed by Govt. of NCT of Delhi vide notification No. F.11(4)/2006.fin(B)/dsfh/1975. I want to know whether the same has been endorsed by the Dir. of Education of Delhi Govt., and if at all it has been endorsed, could you please send me the necessary details of Directorate's notification to this effect. My school is denying me the benefit on the ground that this has not been endorsed by the Dir. of Education. Kindly send the necessary information as soon as possible.

Sudhansu Sharma