A federal appeals court has blocked a National Labor Relations Board rule requiring many businesses to hang posters informing employees of their union-organizing rights.

The U.S. Court of Appeals for the District of Columbia issued a temporary injunction April 17. The ruling follows that of a South Carolina federal judge who earlier said that the NLRB had exceeded its authority with the mandate.

The Associated Builders and Contractors, one of the many business groups that have filed lawsuits to stop the regulation, cheered the decision.

“For the last several months, ABC has vigorously fought NLRB’s politically motivated policies that threaten to paralyze the construction industry in order to benefit the special interests of politically powerful unions,” said Geoff Burr, the association’s vice president of federal affairs. “The NLRB’s notice posting rule is a perfect example of how the pro-union board has abandoned its role as a neutral enforcer and arbiter of labor law.”

The rule was to have taken effect April 30.