All joint locks (arms + legs); All chokes; Heel hooks fully legal at all weight classes (atomic-grappling-style permissive ruleset)
Why people argue about this
People often assume that heel hooks are only legal in lower weight classes due to their controversial nature, but they're actually permitted across all weight divisions at ONE Championship under submission grappling rulesets, including atomic-grappling-style permissive rule sets. This leads to confusion about where and when heel hooks can be used legally.
