A five-judge constitution bench headed by Chief Justice Dipak Misra also said that idea behind the Aadhaar scheme could be the reason that people should have one ID card.
"If your entitlement depends on who you are, then can the government not require proof on that count? Is it not a reasonable condition," a bench, which also comprised Justices A K Sikri, A M Khanwilkar, D Y Chandrachud and Ashok Bhushan, asked.
"A condition is unconstitutional if it requires you to relinquish a constitutional right," the bench said.
The observations came after it was argued that the primary status of a person is that of a citizen and not an Aadhaar card holder.
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Senior advocate Kapil Sibal, appearing for the West Bengal government, said the proof of identity has to be linked with the status of the person which entitles him or her for the benefit and moreover, the citizens must have the choice to prove their identity.
"I can have different ways of proving my identity as a citizen. There are various ways of establishing identity. Aadhaar does not establish my status," Sibal said, adding that the biggest identity is the identity as the citizens.
On the issue of some people having multiple passports and ration cards, the senior advocate said there were laws to deal with law-breakers and it does not mean that the State will make a statute having unconstitutional provisions to deal with law abiding citizens.
"The judgement in this case will decide the course that this country takes. Will we live in a country where there is choice - or do we live in a country where the State is the arbiter of choice," he said, adding that what the court will decide would relate to "me, my children, my grand children and their unborn children".
At the outset, the senior lawyer said in most secured countries, the government takes the citizens' information for 10 years only and then all database are deleted. And this data is used for limited purposes.
Referring to various provisions of the Aadhaar Act, he said that architecture of the law was "unconstitutional" and submitted that the nine-judge bench's privacy judgement had laid down that "the identity of a person cannot be made a public identity and the identity details cannot be centralised".
"Our fundamental identity is that we are the citizen of India," he said and added that the Aadhaar law presumed a "person to be criminal until he is proved innocent".
Referring to the doctrine of "unconstitutional conditions", Sibal said the State cannot make a benefit or privilege conditional upon an individual giving up his or her other rights including fundamental ones.
Highlighting the impact of the Aadhaar scheme, he said the members of the society cannot surrender the rights on behalf of future members which are yet to come to the world.
The CJI summed up the submission of Sibal saying that "you cannot be asked to barter or surrender one fundamental right in order to have access to another".
The hearing will resume on February 15.
Earlier, the court had said that issues like denial of benefits to citizens for either want of Aadhaar or due to its non-authentication may not be a ground for holding the law as "unconstitutional".
The apex court had on December 15 last year extended till March 31 the deadline for mandatory linking of Aadhaar with various services and welfare schemes of all ministries and departments of the Centre, states and Union territories.
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