This is a great site for the offical rule for calling shotgun.
For those of you not in the know “calling shotgun” is the only surefire way to ensure you get to sit in the passenger seat when riding in a vehicle with friends. I agree with Sections I and II. I’ve never invoked Section III. And the admendents I usually play by are Amendment VII: Navigator, Amendment XXXVII: No Hump, Amendment XXXXVIII: The Full View Amendment and Amendment LVI: Sitting Down.
It’s a great way for your friends to battle without leaving any permanent scars.