Haw. Rev. Stat. § 174C-51.5
(a) The commission, as a condition for issuing permits pursuant to this part, may require the use of dual line water supply systems in new industrial and commercial developments located in designated water management areas. The commission shall not require the use of dual line water supply systems if:
(c) For the purposes of this section, the term:
"Developments" means one or more commercial or industrial subdivisions approved after May 30, 2000. It shall not apply to any modification, addition to, or replacement of, any commercial or industrial subdivision in existence prior to May 30, 2000.
"Dual line water supply system" means a supply system that distributes potable and nonpotable water through parallel but separate distribution lines.
[L 2000, c 144, §2]
"May 30, 2000" substituted for "the effective date of this Act".