en 
In reality, this is an urban myth as there is no legislation that mentions any type of fine.
The National Road Safety Authority (ANSR) has already assured that "there is no article in the Highway Code that says it is prohibited to drive in flip-flops, barefoot or with a bare torso".
The only rule related to this topic is Article 11 of the Highway Code, which states that "drivers must, while driving, refrain from performing any acts that are likely to harm the exercise of safe driving".
In various publications on social networks, the GNR always makes a point of reminding you that with or without a t-shirt, it is mandatory to wear a seat belt.
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"Drivers must, while driving, refrain from performing any acts that are likely to harm the exercise of safe driving". Obviously, failing to stop at stop signs, speeding, tailgating and overtaking on blind bends are not included in Article 11 of the Highway Code!
By Greg from Other on 20 Jul 2023, 15:23
Or giving way /indicating at roundabouts, using their mobile whilst driving or failing to ever use the rear view mirror.
By Stephen from Other on 21 Jul 2023, 09:49
Does this mean the ladies are likely to get out their big, bouncy jugs at the wheel? If so, should be fun!
By Billy Bissett from Porto on 21 Jul 2023, 12:55
Why on earth would women want to drive topless even if it's hot outside? That's crazy!
By Lisa from Other on 21 Jul 2023, 18:22
What about bottomless?
By Ian from Beiras on 22 Jul 2023, 09:59
Is this story’ a late April fools!! , I’m more worried about the motorcyclist who wear no helmets, shorts ,vest or tee shirts , sandals or ladies in a dress, that’s a far bigger worry
By Keith from Algarve on 22 Jul 2023, 15:20