HRS §560:2-510
Incorporation by reference
This section lets a will include another document that already exists when the will is signed, as long as the will clearly says it wants to include that document and describes it well enough to identify it. It only covers this narrow rule.
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The statute, as written — Incorporation by reference
A writing in existence when a will is executed may be incorporated by reference if the language of the will manifests this intent and describes the writing sufficiently to permit its identification.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.