The Election Commission will now have to provide an option for negative voting in the Electronic Voting Machines and ballot papers.
The verdict, however, appeared to raise questions over what happens if majority of electorate in a constituency vote negatively.
Election Commission sources said though the electoral law on the issue is silent, the new 'none of the above' (NOTA) option may virtually amount to an invalid vote and those getting the highest votes among the candidates will be declared the winner.
It said casting of the vote is a facet of the right of expression of an individual and the said right is provided under Article 19(1)(a) of the Constitution and "not allowing a person to cast vote negatively defeats the very freedom of expression and the right ensured in Article 21 i.E., the right to liberty".
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A bench headed by Chief Justice P Sathasivam said that negative voting, which is prevalent only in 13 countries across the world, would accelerate effective political participation of people and will "foster the purity of the electoral process" and "it serves a very fundamental and essential part of a vibrant democracy.
"For democracy to survive, it is essential that the best available men should be chosen as people's representatives for proper governance of the country. This can be best achieved through men of high moral and ethical values, who win the elections on a positive vote.