ONE Championship

Super fight: 10 minutes (single period); Title fight: 12 minutes (single period); If tied: judge decision (no overtime golden-score)

All joint locks (arms + legs); All chokes; Heel hooks fully legal at all weight classes (atomic-grappling-style permissive ruleset)

Pulling guard is permitted (not penalized as in ADCC); ONE values active offense from any position; Stalling is penalized regardless of position

No-gi only: rashguard + shorts (or grappling pants); rashguard must cover torso; Mouthguard recommended; protective cup permitted (men); No shoes, no jewelry, nails trimmed, hair tied back

ONE's circular open-floor mat (no cage, no ropes) — same surface used for MMA events with the cage panels removed; ~8m diameter padded mat; Multiple parallel mats not used — single-mat broadcast format

Two competitors per match (super-fight or title-fight format); Weight classes follow ONE's MMA-aligned schedule: Atomweight, Strawweight, Flyweight, Bantamweight, Featherweight, Lightweight, Welterweight, Middleweight, Light Heavyweight, Heavyweight; Officials: 1 mat referee + 3 judges + medical ...

Super fight: 10 minutes (single period); Title fight: 12 minutes (single period); If tied: judge decision (no overtime golden-score)

Decision priority: submission > judge decision (no points-system; judges weigh complete match performance); Champion + interim champion belts per weight class; ONE Submission Grappling super-fight cards integrated into larger ONE event cards alongside MMA + Muay Thai matches

Stalling: warning → point deduction → DQ; Slamming: DQ; Eye-poke, fish-hooking, biting: DQ

All-submissions-legal format including heel hooks places ONE's grappling division at the higher-risk end of competitive grappling. Mandatory comprehensive pre-event medical screening (cardiac, neurological, ophthalmological).