Many teams have handbooks which lay out the expectations, rules, and agreements for team members. For some teams, this may include by-laws. For others, it may just be "rules", or "expectations". You might want to look through handbooks to see what other teams are doing and help to establish a standard of what is right for your team. There are many handbooks available on CD, and there is also a list of handbooks available on usfirst.org,
here.