Minnesota’s drug testing laws are so complicated! How do we craft a workplace policy?

Q: “We are a construction services firm that employs about 170 people, both office and field. Our employee handbook includes sections on drugs and alcohol, but we do not have a formal drug and alcohol testing policy. I am currently working on this so we can get it out to all of our current employees and also include it as a part of our conditional offer of employment. I have reviewed Minnesota Statute 181.951 and 181.952. Is a template or sample drug and alcohol testing policy available that I could use for reference?” – Sandy, Minnesota