Societies enabled to alter, extend, or abridge their purposes is defined under Section 12 of Societies Registration Act 1860
Whenever it shall appear to the governing body of any society registered under this Act, which has been established for any particular purpose or purposes, that it is advisable to alter, extend, or abridge such purpose to or for other purposes within the meaning of this Act, or to amalgamate such society either wholly or partially with any other society, such governing body may submit the proposition to the members of the society in a written or printed report, and may convene a special meeting for the consideration thereof according to the regulations of the society; but no such proposition shall be carried into effect unless such report shall have been delivered or sent by post to every member of the society ten days previous to the special meeting convened by the governing body for the consideration thereof, nor unless such proposition shall have been agreed to by the votes of three-fifths of the members delivered in person or by proxy, and confirmed by the votes or three-fifths of the members present at a second special meeting convened by the governing body at an interval of one month after the former meeting.
SOCIETIES REGISTRATION ACT 1860
Section 1 - Societies formed by memorandum of association and registration
Section 2 - Memorandum of association
Section 3 - Registration and fees
Section 4 - Annual list of managing body to be filed
Section 5 - Property of society how vested
Section 6 - Suits by and against societies
Section 7 - Suits not to abate
Section 8 - Enforcement of judgment against society
Section 9 - Recovery of penalty accruing under bye-law
Section 10 - Members liable to be sued as strangers
Section 11 - Members guilty of offences punishable as strangers
Section 12 - Societies enabled to alter, extend, or abridge their purposes
Section 13 - Provision for dissolution of societies and adjustment of their affairs
Section 14 - Upon a dissolution no member to receive profit
Section 16 - Governing body defined
Section 17 - Registration of societies formed before Act
Section 18 - Such societies to file memorandum, etc., with Registrar of Joint-stock Companies