A consortium is a contractual arrangement under which one or more Managing Agents delegate authority under the terms of a binding authority agreement to another Managing Agent (the Consortium Leader) to enter into contracts of insurance on their behalf.
The difference between a line slip is that a consortium can involve more than one broker.
In practice, authority is given to a consortium leader by followers to apply a single stamp that binds all consortium members. If registered on Xchanging, a 9000/4000 number is issued that enables for premium to flow to all participating syndicates in their pre-agreed shares automatically.
This brings efficiency and ease of processing to all consortium members.