1. There is a maximum team size of four participants. You may have a team of fewer people or even work on your own, but you may have no more than four people per team.
  2. Teams should be made up exclusively of students or recent graduates who are not organizers, judges, sponsors, or in any other privileged position at the event. Volunteers are allowed to participate so long as they are not assisting in judging the event.
  3. All team members should be present at the event. Leaving the venue for some time to hack or sleep elsewhere is fine.
  4. Teams can of course gain advice and support from organizers, volunteers, sponsors, and others.
  5. All work on a project should be done at the hackathon.
  6. Teams can use an idea they had before the event.
  7. Teams can work on ideas that have already been done.
  8. Teams can work on an idea that they have worked on before as long as they do not reuse pre-existing code.
  9. Teams can use libraries, frameworks, or open-source code in their projects. Working on a project before the event and open-sourcing it for the sole purpose of using the code during the event is against the spirit of the rules and is not allowed. If you are using any libraries outside of your own work, make sure that you follow the license terms of those libraries and properly attribute the libraries you use in your submission!
  10. Teams cannot use “starter code” or pre-existing projects as the basis for their hacks. We want to see what you can do on your own!
  11. Teams must stop hacking once the time is up. However, teams are allowed to debug and make small fixes to their programs after time is up. e.g. If during demoing your hack you find a bug that breaks your application and the fix is only a few lines of code, it's okay to fix that. Making large changes or adding new features is not allowed.
  12. Projects that violate the MLH Code of Conduct are not allowed.

Teams can be disqualified from the competition at the organizers' discretion. Reasons might include but are not limited to breaking the Competition Rules, breaking the MLH Code of Conduct, or other unsporting behaviour.