By Ruth Rauls and Jason Ross (May 19, 2017, 11:41 AM EDT) -- As the number of states legalizing and decriminalizing marijuana increases for both medical and recreational use, the legal ramifications of marijuana consumption continue to grow hazier. However, regardless of the expansion at the state level, the simple fact remains that marijuana is illegal under federal law. The contradiction between federal and state laws creates complexities throughout the legal system, and few areas are affected more substantially than the workplace. As marijuana laws expand, so too do the ambiguities and issues for employers. Employers are faced with employees "legally" consuming marijuana under state law, while simultaneously violating company drug use policies, federal "Drug Free Workplace" protections, and zero-tolerance policies....