

Point 3 looks like a pretty obvious poison pill. That is: Russia could conceivably start some sort of grey-zone conflict with Finland before the 6-month period, and thus (per international law) tie Finland’s hands in their use of defensive land mines.
In Finland’s shoes, it’d be prudent to just go “yeah we’re breaking the treaty, and were specifically ignoring Article 20 Section 3 due to urgent national security considerations”.
For the record, MBDA has also stood up an assembly line for PAC-2 GEM-T missiles (amongst other things) in Schrobenhausen, Germany. So there’s at least an alternative supply line for that particular model. Yes I know the logistics are complicated and a lot of US components are still used, but worst comes to worst, I don’t think the EU would have too hard of a time finding regional alternatives if our government decides to pull the rug on technical support for that (which would have much greater and more far reaching implications than a single PAC-2 assembly line).