Where a state complaint investigator finds that IDEA has been violated, a corrective action is ordered. The relief that may be awarded includes compensatory education and reimbursement. 34 C.F.R. § 300.151(b). The purpose of this change to the federal regulations in 2006 was to make it clear that states have broad flexibility in awarding an appropriate remedy in resolving state complaints. 71 Fed. Register No. 156 at page 46602 (August 14, 2006).
Here is the OSEP Topic Brief on State Complaint Procedures.
See also, the Memo to Chief Sch Officers Re Dispute Resolution Procedures Under Part B of IDEA 61 IDELR. 232 (OSEP 7/23/13) The 64 page Q & A attachment includes a detailed Q & A section on state complaints. You can review the memo and Q & A document here.