The Supreme Court today allowed the CEO of the Unique Identification Authority of India (UIDAI) to make a PowerPoint presentation on the Aadhaar scheme at 2.30 pm before it. The constitution bench headed by Chief Justice Dipak Misra asked the petitioners opposing the Aadhaar scheme to prepare a questionnaire after the UIDAI CEO's presentation. The constitution bench is hearing a number of pleas challenging the constitutional validity of Aadhaar and its enabling Act. The bench had yesterday said there are several technical aspects related to the Aadhaar scheme. These include surveillance, data security and exclusion of certain people from receiving benefits for want of either authentication or the lack of an Aadhaar number.