**License plates** are essential elements on vehicles that allow for their identification. According to regulations, all automobiles must have two license plates, one at the front and another at the rear, while motorcycles and mopeds have only one at the rear. Trailers and semi-trailers also have specific requirements for their plates.

It is important to highlight that license plates must be **free of any type of advertising**. This is because their main function is the clear and precise identification of the vehicle, which could be compromised if the placement of advertisements or any other type of additional information is allowed. The regulations are clear in this regard: placing advertising on the license plates of any type of vehicle is not permitted.