Who regulates speed limits and shoreline zones for boating?

Speed limits and shoreline zones for boating are typically regulated by state and local government agencies. In the U.S., this often includes the Department of Natural Resources (DNR), state boating agencies, and local municipalities. Regulations can vary significantly based on state laws and local ordinances, with some areas having specific rules for different bodies of water. Additionally, federal regulations may apply in certain navigable waters, overseen by agencies like the U.S. Coast Guard.