Due to the tritium contamination at Byron, Braidwood and Dresden nuclear power plants in Illinois, the state government passed a law requiring power plants to report the release of radioactive contaminants into the soil, surface water or ground water to the state within 24 hours. Before the law was passed, companies operating nuclear plants were only required to report such releases to the federal NRC. The law was introduced by Illinois State Representative Careen Gordon and State Senator Gary Dahl, and was signed by Illinois Governor Rod Blagojevich on June 11, 2006 and became effective immediately upon his signature. The state government only found out about the tritium releases at the Exelon-owned plants after local officials near the Braidwood plant informed them. Following that revelation, other information about spills at Braidwood, Byron, and Dresden came to light. The state of Illinois contended that it was not informed of the leaks by Exelon in a timely manner. The law also required all Illinois nuclear power plants to submit to quarterly inspections by the IEPA and the Illinois Emergency Management Agency.