HRS §121-42
Pay requires official orders
This section says that members of the army or air national guard cannot get the pay described in this law unless their official orders (or later orders) say they will be paid for the service. It is a narrow rule about how pay is approved.
everyone
The statute, as written — No pay without orders
No officer or enlisted member of the army or air national guard shall be entitled to receive the pay herein provided unless the orders detailing the officer or enlisted member for duty or subsequent orders, specify that pay is to be received for the service rendered.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.