remain-seatedIf you manage to sit in Shotgun before anyone has called it, you keep the position even if someone else calls Shotgun after you are seated. This is very similar to the Hand on Door rule where you do not actually have to say Shotgun, nor does anyone else have to be present, for you to claim it.

This rule is also in place for vehicles, such as some Jeep Wranglers, where doors are removed or not present.