Tax deduction under section 35AC: Government notifies approved institutions and eligible social welfare projects for deduction eligibility. Notification under section 35AC lists 34 approved institutions and their eligible projects, records estimated project costs and specifies the maximum amounts allowable as deductions under section 35AC. The approval and deduction applicability are fixed for three financial years commencing with 2012-13 to 2014-15, and the notification records substituted entries where project descriptions or costs were amended by later notifications.