Not quite what I meant Ian. I mean over all, not just for a GF. Rules on who clashes with who and which teams require you to actually wear a clash strip versus simply wearing white shorts. Or whether a team really needs to wear white shorts at all (like for example, the Swans are treated specially on this subject). It seems to be a moving feast made up as the AFL goes along. For example, when clash strips first came in, we only needed to wear it against Essendon. Each year there seems to be a new clash invented.