(2)It shall be the duty of the Commission to make recommendations to the President as to--(a)the progressive use of the Hindi language for the official purposes of the Union; .(b)restrictions on the use of the English language for all or any of the official purposes of the Union;(c)the language to be used for all or any of the purposes mentioned in article 348;(d)the form of numerals to be used for any one or more specified purposes of the Union;(e)any other matter referred to the Commission by the President as regards the official language of the Union and the language for communication between the Union and a State or between one State and another and their use.