Income exemption for receipts on behalf of a charitable institution, subject to application, investment and filing conditions. Any income received by any person on behalf of Helpers of the Handicapped, Kolhapur shall not be included in such person's total income for assessment years 2004-2005 to 2006-2007 provided the Institution applies its income wholly and exclusively to its objects, limits accumulations (excess over fifteen per cent may be accumulated for no more than five years), confines investments to modes specified in subsection (5) of section 11 (excluding certain voluntary contributions), treats business income as taxable unless incidental with separate books, files returns regularly, and transfers surplus on dissolution to a similar organisation.