It’s illegal to modify a car for any purpose, including the purpose of resale.
It’s also illegal to do it for a fee or in a way that would be a threat to the safety or health of another person.
The act states that the person who is to be involved in a car modification must first obtain a permit from the police.
“The person doing the modification may only do it under circumstances in which they have obtained the consent of the owner,” it states.
“It must be done with the permission of the car owner.”
The act does not mention who may have the right to do what to the vehicle.
Car modification 101 can be found here.