Fishermen in the small town of Cape May, New Jersey, are at the epicenter of a legal challenge that could reshape the landscape of federal agency authority. The fishermen are challenging the entrenched “Chevron” doctrine, which for years has afforded deference to government agencies with respect to reasonable interpretation of ambiguous statutes. The US Supreme Court’s decision could change how industry engages Congress and fundamentally alter how businesses navigate an array of regulations spanning environmental, labor and other domains.