I'd like to know some timelines on that, cursory googling get's me Portugal decriminalized in 2001, Oregon only did that in 2020. Systems don't change on a dime

I'd like to know some timelines on that, cursory googling get's me Portugal decriminalized in 2001, Oregon only did that in 2020. Systems don't change on a dime, how long was the transition period for Portugal?