Haw. Rev. Stat. § 152-5: Designation of areas declared free or reasonably free of noxious weeds.

The department may declare the entire State, an island, or a section of an island as free or reasonably free of a specific noxious weed. The department shall take necessary measures to restrict the introduction and establishment of specific noxious weeds in areas declared free or reasonably free of those noxious weeds.