The judgement was reserved after a marathon hearing which went on for 38 days spanning four months.
A battery of lawyers including Attorney General K K Venugopal, who represented the Centre and senior advocates like Kapil Sibal, P Chidambaram, Rakesh Dwivedi, Shyam Divan, Arvind Datar, Rakesh Dwivedi had appeared for various parties.
During the arguments spread over four months, the Centre had strongly defended its decision to seed Aadhaar numbers with mobile phones, telling the top court that it could have been hauled up for contempt if the verification of mobile users was not undertaken by it.
The court had also not agreed with the government's contention that the Aadhaar law was correctly termed as a Money Bill by the Lok Sabha Speaker as it dealt with "targeted delivery of subsidies" for which funds came from the Consolidated Fund of India.
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