(i)where the institution or fund derives any income, such income would not be liable to inclusion in its total income under the provisions of sections 11 and 12 [* * *] [ Certain words omitted by Act 21 of 1998, Section 29 (w.e.f. 1.4.1999).] [* * *] [ Certain words omitted by Act 20 of 2002, Section 30 (w.e.f. 1.4.2003).] [or clause (23-AA) or clause (23-C)] [ Substituted by Act 11 of 1987, Section 35, for " or clause (23-C)" (w.e.f. 1.4.1988).] of section 10: