A federal occupational safety regulation prohibits federal employees from operating "machinery" at work if they are taking sleep medication. In past cases, bulldozers, tractors, backhoes, and chainsaws ARE "machinery" within the meaning of the law; however, electric toothbrushes, electric razors, weedwackers, and leaf blowers are NOT.

Baraba, a federal employee, is cited for operating a walk-behind lawnmower on the job while on sleep medication. Did Barbara violate the safety regulation?