If drivers are required to have a Class B CDL in order to operate vehicles, then the FMCSA Regulations in Part 382 and Part 383 will apply to your operations. Other areas of the regulations, such as Part 391 or Part 395, may apply to the motor carrier even if they don’t leave the state. Those sections apply to motor carriers operating in interstate commerce, which cannot be determined based solely on never leaving a given state. Interstate commerce is an activity that might occur without a truck ever leaving a single city. We advise that you contact the FMCSA for assistance in determining the applicability of the regulations.