INDIANAPOLIS (AP) – The state attorney general's office says two dozen more school districts have joined a lawsuit filed by the state of Indiana and 15 other school districts in October against the Internal Revenue Service challenging rules it imposed to implement the federal health care overhaul. 
 
The lawsuit filed in U.S. District Court in Indianapolis contends the federal health care law does not allow financial penalties in states that didn't create their own online marketplaces where people can buy insurance. Such states instead ceded that task to the federal government. 
 
The amended lawsuit asks the federal court to issue an injunction blocking the IRS and other federal agencies from applying the law and the penalties it calls for.
 
The federal government has not responded to the lawsuit.