Section 35AC exemption extended for Bongaigaon Refinery welfare scheme with extended period and increased project cost. The Central Government notifies that the Bongaigaon Refinery & Petrochemicals Limited welfare project remains eligible for income-tax exemption under the Explanation to section 35AC, extends the notified three year eligibility for an additional three financial years following a positive recommendation by the National Committee for the Promotion of Social and Economic Welfare, and amends the earlier notification to increase the previously specified maximum project cost for the scheme.