We have team rules, though we don't exactly have a "list" (except for travel rules, which are pretty straightforward and are given to us before the competition season). In general, students are just expected to be on their best behavior and remember that they are representing the team.
A new "three strikes" rule was implemented this year to enforce discipline. If a student has three discipline issues, he or she can be restricted from traveling. Thankfully, nobody was subject to this rule this year. Everyone represented the team very well during both the build season and at competitions.
The biggest thing that our team does to enforce discipline is to hold interviews each year. On the way back from Atlanta, the whole team is disbanded (with the exception of our end of the year banquet in May). Every student must reapply, and if they have had discipline issues or haven't done their share of the work, they might not make the team again. Now, this may seem hard on some students, but they are allowed to re-interview later in the year and show if they are ready to be a member of the team again. This system has worked very well for us.