The solicitor general told the bench that SECC 2011 is not OBC data.
"SECC refers to socially and educationally backward. There can be people other than OBCs who are socially and educationally backward", he said.
"These are the factors why this data is so flawed and it is not made public because this is bound to mislead and bound to defeat the object. I fully support that there has to be reservation for OBCs but the exercise which they have to undertake will be as per the constitution bench's decision", Mehta said.
Senior advocate Shekhar Naphade, appearing for Maharashtra, argued that the state has said in its counter affidavit filed in the matter that the Centre had told a committee of Parliament that 98 percent of data obtained from the 2011 caste census was correct.
"If that is the contention there, then how can they say it is not reliable?" Naphade said.
However, Mehta said that in Parliament, the answer depends upon the question which one frames.
According to him, the Centre has said in its affidavit before the Supreme court that SECC 2011 data is not reliable for the purpose of reservations.
During the hearing, the bench observed that one can go ahead with the reservation for OBCs only if they comply with the triple test as mentioned in the constitutional bench
verdict of 2010 and also the judgement delivered later by a three-judge bench.
"It (SECC 2011) is not reliable at all. I will be able to satisfy the Court," Mehta said.
Naphade argued that the essence of democracy is that Zila Parishads and Panchayat Samitis cannot be organised without a proper elected council.
Excess representation is also antithetic to democratic values, the bench observed.
The arguments in the matter will continue on Wednesday.
The Centre had in September this year filed an affidavit in the Supreme Court stating that the caste census of Backward Classes is administratively difficult and cumbersome and excluding such information from the purview of the Census is a "conscious policy decision".
The government had said in its affidavit, filed by the Secretary of the Ministry of Social Justice and Empowerment, that the caste enumeration in the SECC 2011 was fraught with mistakes and inaccuracies.
It had said that the Centre had already issued a notification in January last year prescribing the series of information to be collected during Census 2021 and it covers many areas including the information relating to Scheduled Castes and Scheduled Tribes but does not refer to any other category of caste.
The Centre had also claimed that the SECC 2011 survey was not intended to be a survey to identify the OBCs as alleged, but a comprehensive exercise to enumerate the caste status of all households in the country, as per their statement.
In March this year, a three-judge bench of the apex court had
held that reservation in favour of OBCs in concerned local bodies in Maharashtra cannot exceed 50 percent of the total seats.