A National Labor Relations Board complaint says that as a joint employer of workers from IT staffing firm Accenture Flex, the tech giant should be obliged to negotiate with its union.

The case outcome could set a precedent for how contract workers are treated across the tech industry, where companies frequently rely on third-party staffing firms.

Alphabet's Google is facing a second complaint from a U.S. labor board claiming that it is the employer of contract workers and must bargain with their union, the agency said on Monday.

Now, Google is about to go through another lawsuit from US contract workers who claim that the Mountain View giant is actually their employer, so it must negotiate with their contractors’ union in the event of any potential change to working conditions.