Due to a catastrophe with the Yata-Lock, the Advanced Format in Yu-Gi-Oh is created. The Advanced Format has a Banlist, a limited list, and a semi-limited list, which is used in most tournaments. Also, every 6 months (At March and September of each year), there are changes in the banlist of the Advanced Format.
The Banlist states that certain cards are not allowed.
The Limited list states that only one of a card is allowed in a deck
Semi-limited cards are cards that two are allowed.
Aside from the banlist, there are no changes to the rules.