(1) The District Commission, the State Commission or the National Commission shall not admit a complaint unless it is filed within two years from the date on which the cause of action has arisen.
     (2) Notwithstanding anything contained in sub-section (1), a complaint may be entertained after the period specified in sub-section (1), if the complainant satisfies the District Commission, the State Commission or the National Commission, as the case may be, that he had sufficient cause for not filing the complaint within such period:
     Provided that no such complaint shall be entertained unless the District Commission or the State Commission or the National Commission, as the case may be, records its reasons for condoning such delay.