Two Young Girls Posing On The Old Sidecar

In Taiwan, Article 39-2 of the Road Traffic Security Rules (zh:道路交通安全規則) prohibits the registration of new motorcycles with sidecars but do not specifically restrict fitting them later.
Bicycle sidecars
Sidecars have sometimes been fitted on bicycles. The "Watsonian" brand was popular from the 1930s to the 1950s in the UK. There remains the problem of applying side-thrust to light-weight components only intended and built to resist radial forces. However, the Philippines pedicab is usually of that configuration.