MMA Rules: The UFC Does Not Write Them — and 12-6 Elbows Are Legal Now

The promotion does not make the rules

This is the thing most people have backwards.

Search for “UFC rules” and you will find pages describing them as the UFC’s. They are not. The Unified Rules of Mixed Martial Arts are maintained by the Association of Boxing Commissions and Combative Sports, and they are adopted — individually, voluntarily — by state athletic commissions.

New York’s regulations, for example, state that professional contests in the state are conducted under the Unified Rules as adopted and amended by the ABC, unless the commission directs otherwise.

So the rules governing a UFC fight are, in a real sense, state regulation. The promotion complies with them the way any licensed business complies with the law of the place it operates in. It does not get a vote in the way the NFL’s owners do.

That has a practical consequence worth knowing: because each commission adopts the model separately and may direct otherwise, the applicable rules are a question of jurisdiction, not of promotion.

Where the rules came from

The framework was built by regulators, not fighters or promoters.

In April 2000 the New Jersey State Athletic Control Board convened promoters, officials and regulators to agree a common ruleset. Referee John McCarthy, who had officiated from the first UFC event, was among those who shaped it. The Association of Boxing Commissions unanimously adopted the resulting Unified Rules on 30 July 2009.

The sport had spent its early years being banned jurisdiction by jurisdiction. A single, regulator- authored ruleset was the price of becoming legal, which is why the document reads like a licensing instrument rather than a sporting code.

12-6 elbows are no longer a foul

This is the change almost no MMA rules page has caught up with.

The 12-6 elbow — a strike travelling straight down, like a clock hand moving from twelve to six — was illegal from the inception of the Unified Rules. It is the rule behind the sport’s most argued- about disqualification.

It is gone. The ABC voted to remove it on 23 July 2024, at its annual conference in Louisville, and the change took effect on 1 November 2024. It does not appear in the current Unified Rules document.

If a page still lists 12-6 elbows among the fouls, it has not been checked since 2024.

A fighter with a hand down is not grounded

The second change from the same package is subtler and matters more often.

The current definition is exact:

A fighter shall be considered grounded and may not be legally kneed or kicked to the head when any part of their body other than their hands or feet is in contact with the canvas.

Read what it excludes. Hands and feet do not count. So a fighter crouching with one hand on the canvas is not grounded, and may legally be kneed or kicked in the head.

That directly reverses the understanding most fans still carry, in which touching a hand down bought protection. It had become a tactic — a fingertip placed on the mat purely to make a head kick illegal — and the rewritten definition exists to stop it.

Anything else touching the canvas does ground a fighter: a knee, a hip, a shoulder, a seat.

The fouls, from the document itself

The Unified Rules list fouls with definitions attached, and several of the definitions are narrower than the headline suggests:

Pile-driving is not any slam. Any throw with an arc to its motion is legal, even if the opponent’s head hits the canvas. The foul is specifically driving a vertically inverted opponent down onto their head. And a fighter caught in a submission who lifts their opponent may bring them down however they like — the rules place the responsibility on the fighter applying the hold.

Back of the head is measured, not judged: from the crown with a one-inch variance either side, down to the occipital junction, then the full width of the neck and down the spine with a one-inch variance from the centreline.

Stomping excludes axe kicks, and excludes stomping the feet of a standing opponent.

Grabbing the fence is permitted right up to the point of control. Hands on the fence, feet against it, toes through the mesh — all legal. Gripping it to control position is the foul.

Gloves and shorts may not be used to control an opponent, but gripping the hand itself is legal, and holding your own shorts or gloves is fine.

Why this document is written the way it is

Compare it with boxing’s rules, which evolved over a century through competing sanctioning bodies, or with the laws of football, which a single international board revises annually.

The Unified Rules read differently because they were drafted to satisfy regulators that a legitimately dangerous sport could be supervised. That is why fouls come with anatomical measurements and why definitions try to close tactical loopholes rather than state principles.

It is also why the rules change through a commissioners’ vote at an annual conference rather than through the sport’s dominant promotion — and why a change approved in July does not take effect until November, giving jurisdictions time to adopt it.

More on the bodies that govern sport is in how sport is run.