Declares that the purpose of the Washington invasive species council is to provide policy level direction, planning, and coordination for combating harmful invasive species throughout the state and preventing the introduction of others that may be potentially harmful.

Declares that the Washington invasive species council is a joint effort between local, tribal, state, and federal governments, as well as the private sector and nongovernmental organizations. The purpose of the Washington invasive species council is to foster cooperation, communication, and coordinated approaches that support local, state, and regional initiatives for the prevention and control of invasive species, not to usurp the individual mission of any of its member organizations or to duplicate effort. Existing statutory authorities of state agencies participating in the Washington invasive species council are not changed by this act.

Requires the Washington invasive species council to develop and periodically update a statewide strategic plan for addressing invasive species.