As you are part of a clan (Or at least most of you), it is not unknown that your clan may contain multiple line-ups and every line-up plays their best. That’s where the preliminary league comes. In every season of the GCB Preliminary League, all line-ups of ONE CLAN will face each other and the best line-up will represent your clan to the Primary League.
After each season, teams up and down the tiers change leagues for the following season based on their results in the current season. The simplest version is that the top thirty-two teams go up a league.