HRS §134-34
When a national emergency is declared
This section says a national emergency or crisis is considered to exist when the governor and the top U.S. military commander in Hawaii, or that commander's official substitute, decide it does. It gives those two leaders the power to make that call.
courts
The statute, as written — National emergency, when
A national emergency or crisis shall be deemed to have arisen when the governor and the senior United States military commander headquartered in the State or, in the absence of the commander, a duly designated representative have, in the exercise of their discretion, so determined.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.