(1) The provisions of this Act shall have effect notwithstanding anything inconsistent therewith contained in any other law or in the terms of any agreement or contract of service, or in any standing orders applicable to the establishment whether made before or after the commencement of this Act:
     Provided that where under any such agreement, contract of service or standing orders the contract labour employed in the establishment are entitled to benefits in respect of any matter which are more favourable to them than those to which they would be entitled under this Act, the contract labour shall continue to be entitled to the more favourable benefits in respect of that matter, notwithstanding that they receive benefits in respect of other matters under this Act.
     (2) Nothing contained in this Act shall be construed as precluding any such contract labour from entering into an agreement with the principal employer or the contractor, as the case may be, for granting them rights or privileges in respect of any matter which are more favourable to them than those to which they would be entitled under this Act.