Amendment IV: Eviction
If the vehicle is forced to stop for a serious infraction of the Shotgunner, the Shotgunner must relinquish his/her seat, if the driver so wishes.
Serious infractions have been known to include spilling alcoholic beverages, spilling any beverage, being annoying, breaking parts of the car, and in extreme cases, just being ugly.

Amendment IX: Australian Shotgun
Originally from Australia, if two people tie for shotgun, then the first person to put their thumb on their head is awarded shotgun. If they both do this at the same time, then an immediate pissbolt (race) to the car is required.

Amendment XXVII: Contraband
In the event that the car is about to pass an abandoned case of beer, pornography, or any other form of contraband that the passengers might find useful in some way or another, it is the responsibility of the passenger riding shotgun to open his door and scoop up the said beer, pornography or contraband, while the car is still in motion.
Additionally, if the car is moving at a speed above 15 M.P.H. (24 km/h) the passenger riding shotgun may decline to do so.

Amendment XXXIX: Shotgun Suicide
If the Shotgun caller attempts to open the car door as it is being unlocked (thus causing it to stay locked), he immediately loses Shotgun priviliges for the upcoming ride, and a new round of calling Shotgun must be executed.

3) In the instance the driver's spouse, lover, partner, or hired prostitute for the evening is going to accompany the group, he/she is automatically given Shotgun, unless they decline.

hired prostitute

Section III - The Survival Of The Fittest Rules (a.k.a The Bastard Rules)
1) If the driver so wishes, he/she may institute the Survival Of The Fittest Rules on the process of calling Shotgun. In this case all rules, excepting 1.8, are suspended and the passenger seat is occupied by whoever can take it by force.
2) The driver must announce the institution of the Survival Of The Fittest Rules with reasonable warning to all passengers. This clause reduces the amount of blood lost by passengers and the damage done to the vehicle.
3) Please follow the above rules to the best of your ability. If there are any arguments or exceptions not covered in these rules, please refer to rule 1.8.

im not used to anyone calling shotgun cuz i had a del sol for a minute, BUT, just this past week i had 3 boys fighting over shotty, and they call a shotgun BLITZ. anybody ever heard of this?
i guess once someone calls shotgun, if they dont report "no blitz" before someone yells BLITZ, then they all run towards the car and the first to touch it wins the blitz. lol.