MI SB1188

Prohibits local units of government from adopting or enforcing ordinances that restrict trimming, felling, or removal of vegetation on private property zoned for agricultural, business, commercial, or industrial use, effective 90 days after enactment.

Defines "heritage trees" by species and diameter thresholds (ranging from 16 to 36 inches) that remain protected and cannot be freely removed; heritage trees are excluded from the preemption.

Voids any local ordinance or charter provision requiring mitigation fees, tree planting, or other compensation for vegetation removal on non-heritage trees in the specified zoning classifications.

Preserves local authority to enforce property maintenance standards, regulate vegetation on public property and right-of-ways, manage easements for traffic safety, and enforce state/federal stormwater and soil erosion requirements.

Does not refund fees or fines collected before the enactment date under previously enforceable tree or vegetation ordinances.