The short version.
Everything else — map pool, protests, punishments — is decided by the admin team in Discord. Cheating once means out of the cup and out of the pot, permanently.
Group stage is best of three. The playoffs that follow are best of five and single elimination — one loss and you are out.
Each round is capped at twelve minutes (server timelimit); the higher score takes the round.
Up to 5 players per team — no substitutes, all 5 are equal team members and any 3 of them can play a match. Rosters lock when signups close.
Cup servers run at 25 fps (sv_fps 25). It is set on the server, not by you — nothing to configure client side.
All cup matches are played on FACEIT servers. Practice anywhere you like, but results only count from those.
From the quarter-finals on, uploaded within 24 hours or the result is void.