There are laws that govern the use of car tint film on a vehicle in each of the fifty states in the United States of America.  These laws provide information about how dark the film can be, and in some states, it even stipulates what parts of the vehicle can and cannot be darkened.  The easiest way to find out what these laws entail for the area in which a motorist lives is to call the highway patrol of that state or any local law enforcement office.  However, if a motorist is anticipating moving about from one state to another, then it may take a little more research to find out what the laws are in each of the states that they will be visiting.  These laws vary greatly from one state to the other.  These laws are also written differently in some counties and parishes in a state than in others.  If a resident is thinking of adding car tint film to their vehicle, the best advice is to know exactly what the law is for their address of residence since that is the area where the vehicle will be parked and driven. 

Some states allow only the visor, or the four inch section of the windshield in the front of the vehicle, to have any type of film on it.  Others have a percentage of darkness that is to be followed which is known as the Visible Light Transmission Percentage, or VLT%.  Other states strictly prohibit any type of film that makes the windows look metallic or reflective.  Some states also do not allow specific colors of film, such as Colorado, that prohibits the use of red film. 

There are many types of specifications within the laws for car tint film or net.  Some even specify whether or not net or film is appropriate.  Basically, the difference between net and film comes down to the fact that one contains metallic material and one does not.  Any state that does not allow the mirrored effect is more than likely going to ask that only net material is used since most films do contain metallic materials. 

These laws are in place because of the safety risks and issues that these types of car tint films pose to peace officers and other employees who are involved in interacting with motorists.  It can be extremely dangerous for an officer to approach a vehicle into which he or she cannot see inside.  While most motorists would know to immediately roll down the window to greet the approaching officer, a criminal may not be so inclined to do so for obvious reasons.  Car tint films also allow people to do things in their vehicles that they should not be doing, and this is just another reason for the laws to be in place.  A peace officer, whether it is a county sheriff, city police officer or a highway patrol officer, needs to be able to see what the occupants of the vehicle are doing and who they are for his or her own safety.