S. 13 : Denial of exemption-Trust or institution-Benefit of specified persons-Valuation of rent-Burden to prove inadequacy of rent is on Department-Rent received exceeded valuation adopted by Municipal Corporation for purpose of levying house tax-Merely relying upon the opinion as to rent from property broker firms and websites additions cannot be made-Order of Tribunal is affirmed-Res Judicata-Rule of consistency is followed. [S. 11, 12, 13(2)(b), 13(3)]