Tax exemption for National Culture Fund donors secured subject to compliance with accumulation, investment, audit and filing conditions. Exemption applies to income received on behalf of the National Culture Fund provided the Institution applies or limits accumulation of income to prescribed thresholds and periods, confines investments to permitted modes, treats business income as taxable unless incidental with separate accounts, files returns regularly, obtains and files the prescribed audit report, and on dissolution transfers surplus assets to a like-minded organization; the exemption covers only receipts on behalf of the Institution, is effective from assessment year 2003-04, and is rescindable if conditions or genuineness are not satisfied.