Why this rule??!!

In a B-School, many competitions are floated - some by other B-Schools and some by corporates. As with any competition, there are some rules and guidelines which are laid down by the organisers. The participants are told about expectations, team size, deadlines, deliverables and prize money.

But one thing which just beats my imagination is this rule - "All team members must be from the same B-School." This is understandable for companies which generally float competitions in select campuses (from where they generally recruit) and making intra-campus team will increase work load for them. Also, they generally follow a format of campus winner and then a National winner.

But why this rule in a B-School fest??? I find no logic in having such a limitation. When a competition is open for MBA students of n number of colleges, there is no reason why there should be such a restriction. I am quite there are very limited competitions which allow only one entry per B-School and there it makes sense, but otherwise, this rule has no relevance.

Or maybe I am missing something!