Police are warning visitors that riding on L-plates will likely see them end up in court - and their machine seized.
Officers took to Facebook to remind people that only provisional licences issued by the Isle of Man government are valid here.
They add riding on the Island with a UK or foreign provisional licence is illegal.
And they're warning officers will seize vehicles and riders will be summoned to court.
Your chance to shine as TT film extra WON'T be today
If you were heading to the grandstand today to cheer on Channing Tatum, organisers say you're going to be disappointed!
Michael Evans not seriously injured after practice session crash
A TT rider's confirmed he's avoided serious injuries after coming off during last night's qualifying.
Island charities join forces in wildfire warning
Three Island charities have issued a joint warning about wildfires in this spell of hot weather.
TT festival fun moves off the course today
There's no action on the TT course today after organisers confirmed they wouldn't need to use a contingency session.
Bee Gee not dead, says family after viral hoax
Bee Gee Barry Gibb is alive and well - despite claims by an online hoax.
Team gives update after Crowe Brothers injured in practice
A TT sidecar team's issued an update after an incident during last night's practice session.
All roads now open on TT course
TT organisers say all roads around the TT course have now reopened.
TT organisers confirm no contingency session tomorrow
The clerk of the course has confirmed the TT schedule remains unchanged after tonight's red flag incident, and there won't be any contingency session tomorrow.
