The bill amends the Natural Resources and Environmental Protection Act to enhance the management and regulation of fish in the Great Lakes and connecting waters. It establishes that all fish in these waters are state property and introduces new definitions related to commercial fishing, such as "abandoned gear," "aquatic species," and "commercial fish species." The bill outlines the rights and responsibilities of licensed commercial fishers, including conditions for license renewal and requirements for taking and selling fish. It also includes provisions to prevent interference with lawful fishing activities, granting the Department of Natural Resources authority to inspect operations and manage fish populations through data analysis. Licensed commercial fishers are required to provide financial remuneration to the state for fish taken for commercial purposes.

Additionally, the bill proposes several amendments to existing fishing regulations, including stricter rules regarding the use of fishing nets, mesh sizes, and the handling of fish species. It mandates that licensed commercial fishers report lost or vandalized gear immediately and establishes penalties for violations, including fines and potential imprisonment. The bill clarifies the measurement of fish and introduces new definitions while prohibiting devices that could hinder fish identification. It also outlines the licensing process, including annual applications and the necessary information to be included, and mandates that the Department of Natural Resources maintain records of all applications and licenses. Overall, the legislation aims to ensure sustainable fishing practices and compliance with regulations while enhancing the protection of aquatic species in the Great Lakes.