The other ground raised by the revenue that the assessee has not registered under A.P. Charitable & Hindu Religious Institutions and Endowments Act, 1987 and hence the assessee is a non charitable one, is an argument to be admitted only to be rejected. The provisions of Sections 2(15), 11 to 13 are very clear and self contained code in respect of institutions which are considered as charitable in nature and the exemptions that these institutions are eligible for under the Income tax Act.