(1) No person who has a direct interest in the matter under reference, or whose services are not immediately available for the purposes of the Committee shall be nominated a member of the Committee of Arbitration.
     (2) If, in the opinion of the District Magistrate any person who has been nominated has a direct interest in the matter under reference or is otherwise disqualified for nomination or if the services of any such person are not immediately available as aforesaid and if the Board or the other person by whom any such person was nominated fails to nominate another member within seven days from the date on which it or he may be called upon to do so by the District Magistrate, such failure shall be deemed to constitute a failure to make a nomination within the meaning of section 327.