The River Boards Act,1956
Section 11. Temporary association of persons with Board for particular purposes
(1) The Board may associate with itself in such manner and for such purposes as may be determined by regulations made under this Act any person whose assistance or advice it may desire in performing any of its functions under this Act.
(2) A person associated with the Board under sub-section (1) for any purpose shall have a right to take part in the discussions of the Board relevant to that purpose, but shall not have a right to vote at a meeting of the Board, and shall not be a member for any other purpose.