After Preliminary Approval: The 18-Month Clock Most Minnesota Operators Misread
- Drew Duffy, MHA, FACHE

- Jul 23
- 5 min read
Drew Duffy, MHA, FACHE · Founder, CannaPath Regulatory Solutions
A few years back, a colleague of mine left a long career in healthcare and decided to open a cannabis shop here in Minnesota. Careful person. Did his homework on just about everything or thought he had. He found a location he loved, negotiated a good lease, and signed it before he called me.
The spot sat too close to a protected use. It broke the buffer rule. And backing out of a signed commercial lease is not a weekend errand. It cost him months, real money, and a stretch of nights that had nothing to do with running the business he actually wanted to run. That episode is the reason CannaPath exists, and it is still the first story I tell anyone who has just cleared preliminary approval. Because it points straight at the thing people miss: the costly mistakes in this process do not happen at the finish line. They happen early and quietly, while a clock you did not know was running keeps ticking.
If you have received preliminary license approval from OCM, that is worth celebrating. Plenty of applicants never get there. But I want to be straight with you, because clarity is the only thing I sell here: preliminary approval is not the finish line. It is the starting gun. And the race has a time limit.
The clock, and what it is actually counting
You have 18 months from the date of your preliminary approval to submit what turns a preliminary license into a real one: the address and legal description of your location, the local unit of government you will operate in, your local zoning certification, and any updated plans the office asks for.
Eighteen months sounds like a lot of runway. It is not, and the reason is a detail most operators do not find out until it is already working against them. That 18-month mark is not the day you need to be open. It is your deadline to hand in a complete, compliant package. Those are two very different deadlines, and the space between them is where people get hurt.
The 90-day catch nobody plans for
Once you submit, OCM has up to 90 days to do one of two things: grant final authorization and issue your license or send the package back with a rejection that spells out exactly what was wrong.
Sit with that for a second, because it changes the arithmetic. Say you treat month 17 as “still have time” and file right up against the deadline. If anything in the package is not clear, a zoning certification that comes back wrong, a plan of record that is not right, a location problem you did not catch, you can watch that full 90-day window run out and land on a rejection instead of a license. Now you are past 18 months, and the problem in front of you is a good deal larger than the one you started with.
I have watched sharp, diligent operators walk themselves into exactly that corner. Not out of carelessness. Out of not knowing the clock was really an 18-month deadline stacked on top of a 90-day review, and that a single deficiency could put those two windows on a collision course.


What actually has to happen inside the window
Underneath the paperwork, those 18 months are a sequence of gates, and most of them move on someone else’s schedule, not yours.
Your location has to be locked down and compliant.
Not just leased. Checked against buffer and setback rules and local zoning before you commit a dollar. (See the story up top. I mean it.)
Your local government has to certify you.
Cities and counties run their own registration and zoning processes on their own calendars, and they vary a great deal from one place to the next. Some move fast and treat you well. Some do neither.
Your plans of record have to be finished and right
Because they are part of what gets reviewed. The security plan, the operations, the written account of how you will actually run the place.
Your space has to be ready to pass a pre-licensure inspection.
That inspection is a real look at whether what you put on paper exists in the building. It is not a rubber stamp.
Every one of those has a lead time. Line them up end to end, then add the plain fact that at least one will take longer than you planned, and 18 months stops feeling generous in a hurry.
The clarity: what you can actually control
Here is the part I care about most, because it is the part that belongs to you.
You cannot speed up your city’s zoning office. You cannot shorten OCM’s 90-day review. What you can do is refuse to let the calendar be the thing that beats you.
Work backward from the deadline
Instead of forward from today. If the office can take 90 days to answer, your real internal cutoff to submit sits closer to month 14 or 15, not month 18. Build that cushion on purpose, then guard it.
Settle the location first, and settle it before you sign anything. This is the highest-leverage decision in the whole window and the hardest one to unwind when it is wrong. Verify the buffers. Verify the zoning. Confirm the local government will actually register a cannabis business at that address. Then, and only then, sign.
Get your plans of record and documentation right early, not the week before you file. The SOPs, the security plan, the operational records that prove you are who you said you would be. Those are not documents you throw together at the end. They are the structure that carries you through the inspection and the review in one piece.
Learn what the pre-licensure inspection will ask of you, and close those gaps before an inspector does. Walking your own space with an experienced eye, months ahead, is the cheapest insurance you will buy in this entire process.
The operators who clear this window cleanly are not the ones with the deepest pockets or the prettiest location. They are the ones who understood on day one that the clock was already running, and planned like it.
Preliminary approval means the state believes you can do this. The 18 months is where you show them they were right. Treat that time as the work and not the wait, and the deadline stops looking like a threat. It turns into one more thing you have already handled.
That is where the clarity leads.
-Drew
CannaPath Regulatory Solutions helps Minnesota operators move through the preliminary-approval window without giving back time they cannot recover.
Location and buffer verification, plans of record, training and a pre-licensure gap analysis that finds the problems while there is still room to fix them. If you are holding preliminary approval and want a clear-eyed read on where you stand against your 18 months, that is exactly what we do.

