In Indiana, for example, the state's Environmental Policy Act is modeled after the federal law, requiring impact statements for all major state actions significantly affecting the environment, but it exempts state issuance of licenses and permits. The law in Hawaii is unique in that it requires development of alternatives to minimize or mitigate adverse impacts on biodiversity. Alaska requires prior approval from the commissioner of fish and game before construction begins on any project. Construction plans and mitigation measures to protect fish and game must be submitted. In addition, a special areas permit must be obtained for any activity that may affect fish and wildlife populations, and any impacts to these populations must be mitigated.
Environmental assessments continue to be an area of active legislative interest in the states.
In Delaware, pending legislation would require a study of the environmental impacts of any construction by the Department of Natural Resources and Environment Control adjacent to private land.