Michigan Compiled Laws, Chapter 324. Natural Resources and Environmental Protection § 324.33924

(a) “Department” means the department of natural resources unless expressly indicated otherwise.

(b) “Possession”, “occupancy”, and “improvement” include dredging or ditching, the throwing up of embankments, sheetpiling, filling in, the erection of fences, a boathouse, land made by dredging and filling, or building structures.

(c)“Person” means an individual, partnership, corporation, association, or other nongovernmental legal entity.

(d) “Well maintained” means that any structure on the land complies with township building codes and current county and state sanitation codes and part 325 and that the land is adequately protected from erosion.