Complex sentence: It's already in place for ArbCom bans, which don't usually go through BASC but are publicly appealed/reconsidered via the Amendments and Clarifications process, which anyone can request.
Split into simpler sentences: It's already in place for ArbCom bans, which don't usually go through BASC. Instead, they are publicly appealed/reconsidered via the Amendments and Clarifications process, which anyone can request.