Michigan Compiled Laws, Chapter 324. Natural Resources and Environmental Protection § 324.3301

(a) “Aquatic invasive species” means an aquatic species that is nonnative to the ecosystem under consideration and whose introduction causes or is likely to cause economic or environmental harm or harm to human health.

(b) “Aquatic nuisance” means an organism that lives or propagates, or both, within the aquatic environment and that impairs the use or enjoyment of the waters of the state, including the intermediate aquatic hosts for schistosomes that cause swimmer's itch.

(c) “Certificate of coverage” means written authorization from the department to implement a project under a general permit.

(d) “Department” means the department of environmental quality.

(e) “Director” means the director of the department.