18. (1) In the Assembly, business shall be transacted in Hindustani (Hindi or Urdu) or English, provided that the Chairman may permit any member unacquainted with either language to address the Assembly in his mother tongue. The Chairman shall make arrangements for giving the Assembly, whenever he thinks fit, a summary of the speech in a language other than that used by the member and such summary shall be included in the record of the proceedings of the Assembly.
(2) The official records of the Assembly shall be kept in Hindustani (both Hindi and Urdu) and English.