It's going to be a different environment.
The only way you can have people who have used marijuana in a workplace is if they're not in a safety sensitive position and they have a prescription. You can control the people who are legally using marijuana.
Right now you're not allowed to test somebody on a random basis. You have to have a reason to test, and usually that's triggered because there has been an accident. We don't want to have to wait for an accident to happen before we can test somebody, because that accident could hurt or kill somebody.