There are many variations in the Magic Old School, which can sometimes be confusing for players.
We have compiled the different variations in the different formats of Old School, so that at a glance you can see all the variations. Even so, we recommend that when you go to a tournament you inform yourself well of all the rules and variations.
If there is an error in the rules or the geographical areas where these rules are played, let us know as soon as possible.
Liga Madrileña Old School MTG 
i had done this if it helps
https://drive.google.com/open?id=1iVSJt1Ujabt4rnNpAy5rLSWYxadzhDVe
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CE/IE might be authorized at French events pretty soon, given how the consultation about this is going 😉
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The CE/IE being allowed in the UK is down each TO to decide at every event. Mainly it will be a no.
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I put «Yes» because de possibility exists, but I know is not in all tournaments.
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Nobody actually plays with channel fireball rules in the USA.
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Please, update your useful chart
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So French Boars use London Mulligan nowadays since 2020.
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