It doesnt go into effect until 2018, piss tests will be dependant on the enployer and the situation, if you fail you dont get the job..its still going to be at the employers discretion. Just be smart about things and most people with common sense wont have anything to worry about.
Dont expect to get a government or D.O.T. job with dirty piss...startup and tech companies tend to be more lax
medical patients still get medical cards and recs, but recreational weed can be purchase by anyone 21+ like alcohol basically. Colorado is the same way, anyone 21 and up can buy weed from recreational dispensaries, which are like liquor stores for weed
Theres a ton of other places online that can break the shit down better the siccness just to be real...bur there my 2 cents