California Bosses Must Prove Workers Are High Under New Pot Law

California employers have 15 months to figure out the best way to determine if employees are impaired and trying to do their jobs after smoking marijuana or eating cannabis-infused snacks.

Attorneys and scientists say there’s currently no way to do that accurately.

“None of these workforce drug tests are able to assess impairment,” said Barry Sample, senior science consultant for Quest Diagnostics Inc.’s Employer Solutions franchise.

VIDEO: How Marijuana Is Both Legal and Illegal in the US

California Gov. Gavin Newsom (D) on Sunday signed a measure (A.B. 2188) that prohibits employers from discriminating ...