See also:

Trailer brakes
WARNING ● Adequate size trailer brakes are required when the trailer and its cargo exceed 1,000 lbs (453 kg) total weight. ● Do not directly connect your trailer’s hydraulic brake syst ...

For U.S.A.
The following information has been compiled according to Code of Federal Regulations “Title 49, Part 575”. ...

Unfastening the front seatbelt
Push the button on the buckle. Before closing the door, make sure that the belts are retracted properly to avoid catching the belt webbing in the door. ...