TCLF’s attorneys have extensive experience in pursuing complex litigation involving multiple parties and questions of first impression before the courts involving regulations, statutes and the U.S. Constitution. 6th, 7th, 8th, 9th, 10th Constitutional Challenges to State Taxes, Tolls, Fees and Regulations The Attorneys at TCLF have represented owner-operator truck drivers and motor carriers to challenge various states’ taxes, tolls, fees, and regulations placing an unfair burden on out-of-state persons in violation of the Commerce Clause of the Constitution.