A member of the legislature whose legal residence is on the island of Oahu and who is required to remain away from the island of the member's legal residence but within the State overnight or longer while on official legislative business during a session and when authorized by the presiding officer of the respective house, shall receive an allowance to cover all personal expenses such as board, lodging, and incidental expenses but not travel expenses. The allowance under this section shall be set at a single rate that will:
HRS § 24-3