kroll. there's going to be an adjustment in how marijuana is mr.ted by employers, as markus had addressed. it will be legalized by the state, but possibly barred by employers. what might you know about issues relating to the liability? elliott? guest: so, to clarify, the testing rules that are being impermanent in colorado right now are obligations that the marijuana businesses have to ensure public safety to their customers. first of all, they are having to test for potency. that is already required. the piece that is coming out is turned to launch on july 1. it is about testing for harmful contaminants. mold, mildew, residual solvents. there's more on that list. er's question about drug testing for employers and employees and this whole issue about driving an impaired is a really tricky issue. many people have wanted -- we are all trying to regulate marijuana like alcohol. but with drug testing, it becomes more tricky. i am an attorney, not a scientist. i will play the little i know. witho