28. For rule 40 there shall be substituted the following rule:—
“40. Any person holding any office under these rules or being a member of any body constituted by or under these rules may resign his office or membership by notice in writing signed by him and sent or given to the secretary of the body of which he is an officer or member, as the case may be; and his resignation shall take effect on the date specified in the notice or, if no date is so specified, on the receipt of the notice by the secretary of that body.”