Question For Truckers And Nexus Pass Users?

[DavidL]

Im thinking of how companies bring there goods back and forth through borders and different states.

When you cross through a border what paperwork or pass do you have that documents what goods you are bringing across the border or to different states? How much in fees do you believe are charged on these items if any? Do you have a pass like a nexus or any special trucking permits that are required by law?

On a more relevant level for those that use a nexus pass to bring goods back and forth the border how do you document what goods you are bringing in (what paperwork?) and what duties/taxes/fees are added? Its my understanding that any thing under 200 dollars is tax and duty free. Is this statement true?