Constitution of India, 1949
89. The Chairman and Deputy Chairman of the
council of States.-
(1) The Vice-President of India shall be
ex-officio Chairman of the Council of States.
(2) The council of States shall, as soon as may
be, choose a member of the council to be Deputy an thereof and, so often as the
office of Deputy Chairman becomes vacant, the council shall choose another
member to be Deputy chairman thereof.