States involved in a settlement agreement with certain tobacco companies to recover health care costs for smoking-related illnesses must participate in a single, national arbitration panel when arbitrating issues, ruled the Indiana Court of Appeals today. In State of Indiana, ex rel., Stephen R. Carter, Attorney General of Indiana v. Philip Morris Tobacco Company, et al., No. 49A02-0706-CV-494, the state appealed the trial court order requiring Indiana to arbitrate with Philip Morris and other tobacco companies the decision of the independent auditor…