How to write a sim racing league ruleset

Most league rulebooks start life as a copy of another league's rulebook, with a few edits. That's a reasonable way to begin. It's also how you end up with rules nobody in your league has read, referring to penalties your platform can't apply.

Here's a way to write one that people will actually use.

Start with what you want the racing to feel like

Before you write a rule, answer one question: what kind of racing is this? A casual Sunday series with mixed experience, a serious endurance championship, and a short-race sprint cup need very different rules. If you want people to race hard and accept the odd touch, say so. If you want clean racing and zero tolerance, say that instead.

Put that in a short paragraph at the top. When a situation comes up that the rules didn't think of, stewards will lean on it.

Keep it short enough to read

A long rulebook doesn't mean a good one. If a driver can't find the rule about contact within thirty seconds, they won't, and then they'll argue about what it says. Aim for a core document you can read in ten minutes, and keep the details (points tables, technical regulations) in separate pages.

A skeleton you can copy

  1. Purpose and spirit. Two or three sentences.
  2. Conduct. How people behave off track: respect, language, handling disputes.
  3. Racing rules. The heart of it. Contact, overtaking, defending, track limits, pit lane, restarts, blue flags.
  4. Procedures. Qualifying, race start, safety cars, disconnects.
  5. Incident reporting. How, where and by when to report, and what evidence to include.
  6. Penalties. The ladder, including what repeat offences do. See the penalty guide.
  7. Appeals. Who handles them, how long you have, and what's final.
  8. Changes. How rules can be amended mid-season.

Write rules you could check on a replay

The best test of a rule is whether two stewards, watching the same clip, would reach the same answer. Compare:

  • "Drivers must leave sufficient room." Sufficient according to whom?
  • "If any part of your car is alongside the other car at the point they turn in, you must leave room for their full width." You can pause the replay and check.

You won't be able to make every rule that precise, and you shouldn't try. But for the situations that cause most protests (overlap, defending, rejoining the track) it's worth the effort.

Spell out the usual suspects

These come up in almost every league, and it's worth being explicit:

  • Overtaking and overlap. Who has to give room, and when does that responsibility start?
  • Defending. How many moves? What about under braking?
  • Track limits. What counts as being off, and what happens if you gain an advantage?
  • Rejoining. Do you have to give way? Wait until the track is clear?
  • First lap. Many leagues are more lenient on lap one, others stricter. Choose.
  • Restarts and safety cars. Where is the line, and who can overtake?
  • Disconnects and lag. What happens to a driver who drops out, and what if the cause was connection trouble? More on that in netcode and incidents.
  • Retaliation. Treat it separately and more harshly than the original incident.

Say what you can't do

If your sim or results tool can't apply a certain penalty live, don't list it. If you can't verify something (a disconnect, a gamepad assist), don't write a rule about it. Rules you can't enforce teach drivers that rules are optional.

Decide how the rules change

Eventually something will come up mid-season that the rules don't cover. Decide ahead of time who can interpret the rulebook, whether changes apply immediately or from the next season, and how drivers get told. "The stewards' interpretation is final for the current round and will be reviewed before next season" is a perfectly good policy.

Test it on old incidents

Once you have a draft, take five or ten real incidents from your last season and run them through. Do the rules give a clear answer? Do two people agree? Anywhere they don't is a spot to rewrite. It's the cheapest quality check available. If you want a second pair of eyes, Sim Racing Steward can read your ruleset and flag which rule it thinks applies to a clip, which is a quick way to see where the wording is ambiguous.

Common mistakes

  • Copying rules from a different type of series
  • Writing penalties for things nobody monitors
  • "At the stewards' discretion" for everything
  • Rules only the admins have ever read
  • Changing rules mid-season without telling anyone

For the broader picture, start with how stewarding works.