(5)[ Notwithstanding anything contained in clause (d) of sub-section (1), where any assets (being debentures issued by, or on behalf of, any company or corporation) are acquired by the trust or institution after the 28th day of February, 1983, but before the 25th day of July, 1991, the exemption under section 11 or section 12 shall not be denied in relation to any income other than the income arising to the trust or the institution from such assets, by reason only that the funds of the trust or the institution have been invested in such assets if such funds do not continue to remain so invested in such assets after the 31st day of March, 1992.] [ Inserted by Act 49 of 1991, Section 8 (w.r.e.f. 1.4.1983).]