Relating to regulation of commercial vehicles.

SB 839 modifies the regulations that govern how commercial vehicles must comply with enforcement requirements. It clarifies specific situations where drivers and owners of commercial vehicles must stop for weight or size checks, such as at open truck scales or when directed by an officer. The bill introduces exceptions for certain vehicles, like empty log trucks, from stopping at 'OPEN' signs under specific conditions. Significantly, it reclassifies the penalties for non-compliance, making failure to stop at an 'OPEN' sign or for a weigh-in-motion scale a Class A traffic violation, while failure to obey a direct instruction from an officer remains a Class B misdemeanor.