 His leadership in redistricting cases in 1981, 1991, and 2001 led to the creation of Latino majority districts on the city, county, and state levels.Del Valle sponsored legislation to protect homeowners by stopping the forgery of quitclaim deeds which is the process of transferring the title or deed of property to another individual or company.He has also sponsored legislation to provide harsher punishment for ATM crimes; provide Illinois with more Early Childhood Teachers; provide comprehensive health coverage for every child in Illinois; and increase funding for Advanced Placement courses in Illinois high schools.