The Michigan Supreme Court ruled Thursday that local officials in Michigan may not ban the use of medical marijuana within their boundaries — a unanimous landmark ruling expected to overturn local ordinances in Livonia, Birmingham, Bloomfield Hills and Lyon Township.

The outcome was hailed by marijuana activists, because if it had gone the other way, there was a chance that the decision would have barred all Michiganders from using marijuana for health purposes. And numerous communities were said to be watching the outcome before considering passage of their own local ordinances.

Read more: Michigan Supreme Court rules local laws can’t ban medical marijuana | Detroit Free Press