The U.S. Chamber of Commerce, National Association of Mutual Insurance and more than a dozen other business groups have joined efforts seeking to have an expanded Pennsylvania Superior Court panel review a recent panel decision that limited the application of the Fair Share Act, and, according to some attorneys, marked a sharp departure in how the law has been applied.

On Thursday, defendants in the case, captioned Spencer v. Johnson, filed their application requesting that an en banc Superior Court court review the case. Nineteen industry groups also entered a filing as amici supporting the defendants.