Bajaj drivers to wear helmets

Last week I hired a three-wheeled motorcycle commonly known as Bajaj to take me somewhere but on our way a traffic police stopped us and asked the Bajaj driver why he was not wearing a helmet. Does the law require a Bajaj driver to wear a helmet?
AK, Morogoro

It is mandatory under section 39(12) of the Road Traffic Act [Cap.168 R.E 2002] for a two-wheeled or three-wheeled motorcycle driver to wear a helmet when he is driving unless he is exempted from wearing a helmet by the Minister for Home Affairs. The traffic police was hence right to stop you and ask the Bajaj driver why he was not wearing a helmet. It is an offence for a Bajaj driver to drive without wearing a helmet. Many people erroneously think that it is only two-wheeled motorcycle drivers who are required to wear helmets.