3. Every appointment of new trustees under section 2 shall be made to appear by some memorandum under the hand of the chairman for the time being of the meeting at which such appointment is made. Such memorandum shall be in the form set forth in the schedule hereto annexed, or as near thereto as circumstances allow, shall be executed and attested by two or more credible witnesses in the presence of such meeting, and shall be deemed to be a document of which the registration is required by the ¹[Registration Act, 1908] section 17.