To achieve this, tax incentives and other assistance such as dereliction aid and gap funding schemes are provided to eliminate barriers for brownfield development. In the US, the Brownfield Act of 2002 sets out the arrangement for providing economic incentives and liability exemptions to developers in Brownfield sites. Prior to the enactment of the Brownfield Act, the federal government, through the 1980 Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), mobilised tax revenues from chemical and petroleum industries, which went to a trust fund (commonly known as Superfund) for cleaning up abandoned or uncontrolled hazardous waste sites.