(1) Every proceeding before the District Commission shall be conducted by the President of that Commission and atleast one member thereof, sitting together:
     Provided that where a member, for any reason, is unable to conduct a proceeding till it is completed, the President and the other member shall continue the proceeding from the stage at which it was last heard by the previous member.
     (2) On receipt of a complaint made under section 35, the District Commission may, by order, admit the complaint for being proceeded with or reject the same:
     Provided that a complaint shall not be rejected under this section unless an opportunity of being heard has been given to the complainant:
     Provided further that the admissibility of the complaint shall ordinarily be decided within twenty-one days from the date on which the complaint was filed.
     (3) Where the District Commission does not decide the issue of admissibility of the complaint within the period so specified, it shall be deemed to have been admitted.