(i) the amount of income-tax calculated at the rate of thirty per cent on the aggregate of anonymous donations received in excess of the higher of the following, namely:—
(A) five per cent of the total donations received by the assessee; or
(B) one lakh rupees, and
(ii) the amount of income-tax with which the assessee would have been chargeable had his total income been reduced by the aggregate of anonymous donations received in excess of the amount referred to in sub-clause (A) or sub-clause (B) of clause (i), as the case may be.
(2) The provisions of sub-section (1) shall not apply to any anonymous donation received by—
(a) any trust or institution created or established wholly for religious purposes;
(b) any trust or institution created or established wholly for religious and charitable purposes other than any anonymous donation made with a specific direction that such donation is for any university or other educational institution or any hospital or other medical institution run by such trust or institution.
(3) For the purposes of this section, "anonymous donation" means any voluntary contribution referred to in sub-clause (iia) of clause (24) of section 2, where a person receiving such contribution does not maintain a record of the identity indicating the name and address of the person making such contribution and such other particulars as may be prescribed.