Interior designers, on the other hand, are required to have a formal education from an accredited institution, to be licensed (in many states), to keep abreast of the latest developments in their field through continuing education, and to have the ability to work in a collaborative team with architects, engineers and contractors. They also have to be familiar with country, city, state and national building codes, to display superior availability, and to do anything it takes to get the job done correctly and on time. And if they meet all of these requirements, they are able to charge the same professional fees that are on the same level as those in the fields of medicine or law, because the work they do is equally important and valuable.