The City of Lansing is in the process of drafting an ordinance to regulate medical marihuana dispensaries.  The current version of the proposed ordinance requires dispensaries to move to industrially zoned areas.  The proposal does not allow already existing dispensaries to stay in their current locations if they are not located in an industrial area.  This affects 37 out of the 41 dispensaries located in the City.  If these 37 dispensaries can establish themselves as lawful pre-existing nonconforming uses, they may be entitled to invoke protections against such a re-location requirement.   More information can be found here.