Some places have this stance and that stance. (Legal to possess and use in a certain quantity on the local/state level)
I work in federal govt and even though my state, county and city has made MJ legal with conditions... many cities have Mary-Jane DISPENSARIES that are deemed ESSENTIAL and are OPEN during the Pandemic ( at 0600 AM !!! with sign toting employees pointing out location of dispensary - so essential govt workers might conveniently purchase on way to work I guess ) ... but the fed govt drug tests employees and if you have THC in your sample you are quickly un-employed.
So it will depend on how the local, state, national, and here, international authorities work it out. There will be differences.
Another left coast state has decriminalized even "Hard" drugs to a large degree recently and there is a lot of discussion over it.
There is an arguement from an economist I really respect where he basically says that the hard druggies ought be free to drug up and their actions will catch up with them real soon and "problem" is over witht he natural consequence of drug abuse (dead horse). That makes sense on one level in that so many monetary and human capital resources are spent on a problem that plays itself out soon... but I disagree with the application of that on the ground in the current situations we have.
The problem with left coast druggies is the local and state govt support them in many ways and they are more apt to keep the gravy rolling... and these druggies do a LOT of damage to society in general with crime and unsanitary living... so there may be the pressure in hte public to stop that... which would be something I would support... except that there are many on left coast who believe it is perfectly acceptable to drug up, urinate, deficate, camp right there permanently and live dirty, and live loud right in front of peoples' living spaces and public spaces like resuraunts and stores. Does anyone like paying $10 USD for one beer and look out the window and see those activities? Not really, but there are a LOT of people who support the rights of druggies to do that stuff and do some wild things like protests and lawsuits when police try to clear that stuff out.
Situations are not as simple to establish and control in the manner one side or other wants.