11.—(1) Subject to paragraph (2) the registered rules of a credit union shall bind the credit union and all members of it and all persons claiming through them respectively to the same extent as if each member had subscribed his name and affixed his seal to those rules and there were contained in those rules a covenant on the part of each member and any person claiming through him to conform to those rules subject to the provisions of this Order.
(2) A member of a credit union shall not, without his consent in writing having been first obtained, be bound by any amendment of the credit union's rules registered after he became a member if and so far as that amendment requires him to take or subscribe for more shares than the number held by him at the date of registration of the amendment, or to pay upon the shares so held any sum exceeding the amount unpaid upon them at that date, or in any other way increases the liability of that member to contribute to the share or loan capital of the credit union.