21. Returning officers.-
For every constituency, for every election to fill a seat or seats in the Council of States and for every election by the members of the Legislative Assembly of a State to fill a seat or seats in the Legislative Council of the State, the Election Commission shall, in consultation with the Government of the State, designate or nominate a returning officer who shall be 2[an officer of Government or of a local authority:]
Provided that nothing in this section shall prevent the Election Commission from designating or nominating the same person to be the returning officer for more than one constituency.