Employer, Fed restrictions could limit the ability of some to use marijuana at any time

(Editor's note: This is the fourth in a series about the recent legalization of marijuana in Montana.)

With recreational marijuana use now legal, the regulations on its use make it much more comparable to alcohol. Every adult over 21 is welcome to use the formally prohibited substances but there are limitations to the freedom. It will, for example, remain illegal to drive under the influence of marijuana.

There are also likely limitations to the leeway one can take when it comes to the workplace. Ballot Initiative 190, the initiative that legalized recreational marijuana, lays out the limitati...