Section 6(1) in The Delhi School Education Rules, 1973
(1)Teaching in a school at the primary stage shall, as far as practicable, be in the mother-tongue of the child unless the parents or guardian of the child request otherwise in writing:Provided that where the medium of instruction in a school is different from the mother tongue of the child, arrangement shall be made, as far as practicable, by the Administrator for the education of that child through his mother tongue :Provided further that in the cast of an existing primary school in which education is imparted through the medium of any language other than the mother-tongue of the child, education may continue to be imparted in that school through the medium of such other language.
