When another civil penalty is not provided under this chapter, a person that violates a provision of this part or a regulation or order prescribed under this part, or a condition of a registration under this part related to transportation that is subject to jurisdiction under subchapter I or III of chapter 135 or a condition of a registration of a foreign motor carrier or foreign motor private carrier under section 13902, is liable to the United States for a civil penalty of $500 for each violation. A separate violation occurs each day the violation continues.