The Swiss authorities online
Children under 7 years old are allowed to cycle on roads in Switzerland, only if supervised by a person at least 16 years of age. Cyclists also have to abide by the general road traffic regulations.
The vignette (insurance sticker) for bicycles was phased out at the beginning of 2012. Cover against damage caused to third parties in an accident involving a bicycle can be provided by your personal liability insurance. If you ride a pedal-assisted e-bike with a speed of over 25 km/h, you need a motor-assisted bicycle registration plate and an annually-renewable vignette (read how to get one below).
Most insurance companies automatically include cover for cycling accidents in personal liability insurance. You should ask your insurer to be sure you have this cover. If you do not have liability insurance you are no longer insured if you cause damage to third parties in a cycling accident.
Accident victims receive compensation from the Swiss National Guarantee Fund (https://www.nbi-ngf.ch/en/ngf). The fund may claim part or all of the amount paid from the perpetrator of the accident. So it is worth having insurance cover for cycling accidents.
There are two types of electric bike: slow (assisted pedalling up to 25km/h) and fast (assisted pedalling up to 45km/h).
The Swiss Council for Accident Prevention provides brochures on equipment you need to ride a bike, mountain bike or e-bike.