We had two absolute rules
1) Always, but Always, wear your life jacket and wear it properly. Always There's a reason we called them life jackets. (PFD my ass; life jacket!)
2) Do not ever get stopped in the current. Ever. No matter what.
The rest of the rules dealt with the River Gods, alcohol provisioning, men to women ratio, clothing rules for women, and so forth. All subject to interpretation. I posted them around here somewhere.
Rules 1 and 2 were inviolate.
To the extent that I refused to let a very big, very drunk, very angry NFL linebacker on my boat until he put on a life jacket. In calm water. And I was backed up by every other guide on the trip, and later by the home office.