Section 35AC deduction eligibility: government notifies approved charitable projects and specifies maximum deductible costs for limited financial years. The Central Government, on recommendations of the National Committee for Promotion of Social and Economic Welfare, notifies specific institutions and their projects as eligible for deduction under section 35AC, recording estimated project costs, any corpus fund components, and the maximum amount allowable as a deduction over the stipulated period of approval, with most approvals spanning three financial years and specified usage directions for certain allocations.