A 1999 Presidential Executive Order gave this definition of invasive species:
An invasive species is defined as a species that is 1) non-native (or alien) to the ecosystem under consideration and 2) whose introduction causes or is likely to cause economic or environmental harm or harm to human health.
-Presidential Executive Order 13112 (February 1999)
This Executive Order also creation the National Invasive Species Council (NISC) to ensure that Federal programs and activities to prevent and control invasive species are coordinated, effective and efficient. NISC members are the Secretaries and Administrators of 13 federal departments and agencies to provide high-level coordination on invasive species and is co-chaired by the Secretaries of Commerce, Agriculture, and the Interior.
In Missouri, NRCS is addressing invasive species to better assist farmers, ranchers and landowners across the state.