Small business owners will be glad to note that a federal appeals court on Tuesday temporarily blocked the National Labor Relations Board from requiring millions of businesses to put up posters informing workers of their right to form a union. The rule requiring most private employers to display the posters was supposed to take effect on April 30, but the U.S. Court of Appeals for the District of Columbia said that can’t happen until legal questions are resolved.

The NLRB rule required more than 6 million businesses to post an 11-by-17-inch notice in a prominent location explaining the right of workers to join a union and bargain collectively to improve wages and working conditions. The posters also explain that workers have a right not to join a union and that it is illegal for union officials to coerce employees into unionizing.

While a federal judge in Washington had previously found the NLRB rule acceptable,  the temporary injunction followed a federal judge’s ruling in South Carolina last week that the labor board exceeded congressional authority when it approved the poster requirement in 2011.  Since the rules inception, there has always been questions on how the NLRB was going to enforce the regulation.

Business groups have complained the posters are an unfair government effort to promote union organizing and the National Association of Manufacturers had been one of the organizations behind the court action believing that the posting requirement is an unprecedented attempt by the board to assert power and authority it does not possess.

The labor board contends the posters help workers more clearly understand their rights and protections under federal labor law. NLRB attorneys argued the board has the authority to require posters even without specific congressional approval. The NLRB  did not immediately respond to a request for comment after the new ruling.

Similar government posters explaining federal anti-discrimination laws and workplace safety rules are already fixtures in company break rooms. But U.S. District Judge David Norton, in his ruling last Friday in South Carolina, said federal laws specifically allow government agencies to require the display of those posters at work sites. In one of his first executive orders, President Obama ordered that all Federal contractors post a similar poster. Judge Norton noted, however, that  the National Labor Relations Act contains no such language.