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The National Labor Relations Board is proposing requiring companies to put notices of employees’ right to unionize on bulletin boards and maybe via e-mail.

The move occurs one day after the NLRB’s general counsel advocated for making workplace unionization drives less uncomfortable. Both decisions have upset companies and business groups, which see them as enforcement against employers. These actions are consistent with other pro-union moves by the NLRB under President Obama, The New York Times reported.

The board said it is enacting a 60-day comment period on the notification proposal. This is the first time since Congress approved the National Labor Relations Act in 1935 that the board required employers to post information about workers’ rights. Agricultural, rail and airline employers would be exempt from this rule, the newspaper reported.