1. Any member of a grouping may assign his participation in the grouping, or a proportion thereof, either to another member or to a third party; the assignment shall not take effect without the unanimous authorization of the other members.

2. A member of a grouping may use his participation in the grouping as security only after the other members have given their unanimous authorization, unless otherwise laid down in the contract for the formation of the grouping. The holder of the security may not at any time become a member of the grouping by virtue of that security.