Here is the link to the 'federal office of prevention of accidents',it's for all those who know German or French.
http://www.bfu.ch/produkte/kinderrue...m#Vorschriften
Article 3a and 60 regarding the VRV ( Verkehrsregelverordnung)
Driver and all passengers have to be secured with three point or other safety belts on all seats in the car!
From March 1st 2006 onwards this is also valid for lorries and buses ,only exceptions are drivers and passengers on licensed regional bus services.
- Children younger than 7 years old , have to be secured with a child seat or booster seat ( after ECE norm 44) on all** seats fitted with safety belts.
**Exceptions are cars such as school buses,in this case the 'normal' safety belt is enough
- children between 7-12 years old,have to be secured on ALL seats in the car with either a booster seat or similar ( after ECE norm 44) or the safety belts!
- For passengers 12 years and older it's mandatory to wear the safety belts on ALL seats fitted with them.
Apart from that, you may only transport as many passengers as places are registered in the cars document ( Fahrzeugausweis).This is also ( or especially valid) for children transported on the back seat.
Attention:
You also need to consider the instructions of the car manufacturers as well as the children's safety seat manufactures.
Some seats are NOT ALLOWED to be installed on the front passenger seat (possibly activated Airbag).
Most child seat manufacturers therefore only allow for their seats to be installed on the rear bench of the car.
hope this helps
EE