Say I believe no swearing and no pink shirts and my co-organiser thinks no swearing and no blue shirts. It makes sense for us to sit down before the conference

Say I believe no swearing and no pink shirts and my co-organiser thinks no swearing and no blue shirts. It makes sense for us to sit down before the conference and document our official stance on those issues. Then when I see someone wearing a pink (or blue) shirt I know how to respond without starting a fight on the day with my co-organiser. The problem is that you'll never be able to write things down in a sufficient level of detail in a CoC to avoid this situation. Sure, your CoC details what to do when someone wears a pink shirt or a blue shirt. But what happens when someone comes in wearing a purple shirt, and you co-organizer kicks them out because "that shade of purple is too close to blue"? I agree that conference and event organizers and moderators ought to sit down together and figure out how they resolve disputes among themselves. I disagree that a Code of Conduct is helpful in facilitating that.