Haw. Code R. § 19-106-1
As used in this chapter, unless the context clearly indicates otherwise:
"Agriculture" means the husbandry or culture of crops, on or in soil or water.
"Agricultural purposes" means any action or activity whose primary function is supportive of, related to, used in, or involved with agriculture but excludes the production of crops or raising of livestock primarily for recreational, promotional, or sporting purposes. When used in connection with or as descriptive of a vehicle, this term encompasses vehicles dedicated exclusively to agricultural pursuits, but does not include common or contract carrier vehicles, and private carrier vehicles used to transport agricultural supplies or products by persons not actually engaged in agricultural production. Vehicles owned and operated by agricultural cooperatives organized under chapter 421 of the Hawaii Revised Statutes are deemed to be used for "agricultural purposes".
"Director" means the director of the state department of transportation.
Haw. Code R. § 19-106-1