The decision passed 3-1, with the NLRB General Counsel, Jennifer Abruzzo, arguing the meetings violated worker’s rights, as they were forced to attend and be subjected to the company’s anti-union messaging.

The board's ruling responds to a series of labor complaints against Amazon for engaging in union-busting tactics.

Employers can still hold meetings to express their views on unionization, but must now give workers advance notice and make clear they are voluntary.

After a lengthy consideration, the National Labor Relations Board has ruled that Amazon’s “captive-audience meetings” are a violation of the National Labor Relations Act.

The NLRB said that Amazon managers solicited grievances and made implied promises to remedy them if workers rejected the union during mandatory meetings at the Staten Island wareh

Mandatory “captive audience” meetings in which companies argue against unionization are illegal, the National Labor Relations Board ruled in a case involving Amazon.com Inc., prohibiting one of employers’ most potent weapons against labor organizing campaigns.