S. 12A : Registration-Trust or institution-Condition precedent for claiming exemption-Change in the By-laws and memorandum-Registration granted considering the changes-Registration cannot be granted for earlier years-Repeals and savings-Exemption granted under section 4(3)(i) of the 1922 Act is not valid for getting registration under section 12A of the Act. [S. 11, 12, 297(2)(k), 1922 Act, S. 4 (3)(i)]