From what I understand about the pardons being offered by Ralph et al (to check sources, google Ralph Goodale and pardons for pot), the pardons will be offered only to those who were convicted of simple possession. Which was 30 grams (one ounce) and less. It will not extend to those with more serious violations like trafficking.
As far as impaired driving laws go, this will take a while to sort out. As it stands, there is theoretically a zero tolerance - 2 nanograms of THC showing up in your blood will put you over the limit. Which is ridiculous. You can acquire that by just being around someone who smokes pot. And, THC will show up in that amount of someone who is a regular user for at least a month. That means that if you smoke it for a sleep disorder and consume a joint before going to bed at night, you won't be able to drive to work in the morning. Even though all the effects have worn off (I have found that 3 hours is the max that the effects last...or somewhere around there).
So that will change.
The laws will change as the regulations restrict and impact the profit margins of the major shareholders in the cannabis industry. They have their eye$ on that 8 million dollar prize that the black market generated.
I haven't looked into the names of those who have heavy investments in the green machine, but I have had conversations with the guys who run the dispensary where I buy medical cannabis. One of them was telling me that the major shareholder in one of the big cannabis production/distribution companies (I really need to research this sometime...) was the finance adviser to the government at the time the cannabis bill was being passed through Senate.
I am sitting back and watching - I have waited 47 years for this day. Lol! I was 14 years old in 1971 and fresh out of the JWs when I smoked my first joint. Hell, Armageddon was coming and I only had a few more years left to live anyways. I liked the devil's lettuce from the first time I tried it and I am a supporter of both medical and recreational use. The journey has been awesome and this is quite the experience to watch the next step unfold. All the way from the 70s "Mexican ditch weed" to hydroponically grown medical pot.
And one more thing...in all my years of being around many, many women and hearing their stories of abuse and such, I have never once, not once, heard a woman say "He smoked a joint and then became violent" but, I have heard (more times than I like) "He started drinking and all hell broke loose. I thought he was going to kill me."
Light up Canada.
Today I am legal.