Responding to bench's observation on allowing even private bodies to use the Aadhaar architecture, Venugopal said even though the law has ancillary provisions, the main object was delivery of subsidies, services and benefits.

"Not a single provision in the Act is unnecessary or unrelated to the main purpose or the pith and substance of the Act which is giving subsidies, services and benefits," the top law officer said.

He said as of now, no such contract with private entities with UIDAI was before the court and when such issues are placed before the bench, then only it can be examined.

However, the bench stuck to its observations on Section 57 and said "there is no distribution of benefits and subsidies under section 57." Venugopal also referred to Article 110 (1) (g) of the Constitution and said it contained words "any matter" and the Aadhaar Law fell under this definition and was rightly held as a Money Bill.

His arguments remained inconclusive and will resume tomorrow before the bench, which is hearing a clutch of petitions challenging Aadhaar and its enabling 2016 law.

Senior Congress leader and Rajya Sabhja MP Jairam Ramesh, represented by Chidambaram, had moved the apex court challenging the decision to treat Aadhaar bill as a money bill, which was passed during Budget Session in March 2016, overruling amendments moved in the Rajya Sabha.

Earlier in the day, advocate Zoheb Hossain, appearing for the Maharashtra government, referred to international charters and covenants on harmonisation of socio-economic and civil political rights.

The bench said the Directive Principles of State Policy (DPSP) of the Constitution was essential for good governance and a guarantee of reasonableness of a law. It said though DPSP was "justiciable", it has been read into Article 21 (Right to life and liberty).

Dealing with data protection, Hossain said that framing a law on the subject was a positive obligation cast on the State and the Aadhaar scheme would ensure socio-economic rights of citizens and prevention of leakages of funds.

Referring to judgements, he said when a law conferred discretionary powers to the executive, the validity of the statute cannot be judged by assuming that the executive would exercise its powers arbitrarily.

Hossain referred to the UN General Assembly resolution which says that ideal of freedom can only be achieved if conditions are created so that everyone can enjoy socio-economic and civil political rights. He contended that right to privacy was an individual and personal right and its alleged infringement cannot be raised in a PIL by unconnected NGOs.

The lawyer then gave an example of Aadhaar being used for obtaining SIM card, opening bank account and getting PDS benefits and said the telecom companies will not know the details of a citizen's bank account or information about PDS.

"Similarly, the bank will not have information about the telecom and PDS details of the citizen. The UIDAI would not be have any of the three details," he said, adding there was no possibility of surveillance.

Earlier, lawyer Gopal Sankaranarayanan had opposed the seeding of Aadhaar with the Permanent Account Number (PAN) for income tax in the Supreme Court, saying in no way does it help in preventing financial frauds or curb black money.