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Currently, the consumption, storage or possession of small amounts of drugs for personal use, including marijuana, is not illegal. Not long ago it was a crime.

Is it all drugs? And is that a country wide thing?

It is illegal, but the law is being revised to allow recreational consumption in pre-determined quantities. However, it will still be a very long discussion ahead.

Do different states have the ability to change it or is it a national thing?

Oddly in the US cannabis is illegal according to the Federal govt but many states have legalized it.

No, here it is a national decision. The federal supreme court sets the rules.

Do the states/provinces have much power?

No. Here what helps this strength are the parties (some very specific to be more precise).

Cannabis is prohibited. Some exceptions exist for medicinal purposes.

An interesting debate is now taking place with the authorities:

How much cannabis differentiates you between a user and a dealer?

Ah ok.

We have that caveat here. There is a difference between user and dealer.

The controversy here is as follows:

In the current rule, the difference between user and drug dealer is the color of your skin and the neighborhood in which you live, at the discretion of the police officer.

Yeah. Well that is spreading everywhere. Rule of law isnt set in stone. There are variables of applicability.

It's mainly for medicinal use but they are reviewing the law

I have a headache. Give me a joint.

Cannabis is prohibited. Some exceptions exist for medicinal purposes.

An interesting debate is now taking place with the authorities:

How much cannabis differentiates you between a user and a dealer?