Haw. Rev. Stat. § 328-72
It shall be unlawful for any person to manufacture, mix, compound, sell, or offer for sale in this State for human consumption therein, any unenriched flour; provided that unenriched flour may be used in the manufacture of macaroni, cracker, soy sauce, or other nonbaking products; provided further that unenriched flour may be sold to commercial bakers of bread, rolls, or buns if, prior to or simultaneously with delivery, the baker furnishes to the seller a certificate of intent in such form as the department of health shall by regulation prescribe, certifying that such flour will be used only in the manufacture, mixing, or compounding of flour or white bread or rolls enriched to meet the requirements of sections 328-71 to 328-76. It shall be unlawful for the baker to use the flour so purchased in any manner other than as stated in the certificate.
HRS § 328-72