The trucking industry is heavily regulated at the state, federal, and international level. There are numerous rules and regulations that carriers must obey in order to legally operate, and achieve DOT compliance. The most complex federal rules and regulations pertain to vehicle licensing, trip permits, and the IFTA fuel tax. Navigating these rules can be a challenge, even for companies that have been in business for years. Despite this, it is imperative that carriers follow the letter of the law, otherwise they face stiff fines and penalties and may even risk losing their authority altogether.