Haw. Rev. Stat. § 6E-9

Whenever there is any project by any government agency on lands which are owned or controlled by the State or its political subdivisions and which have historic property or value, one per cent of the appropriations for the project or so much thereof as may be necessary, shall be expended for the investigation, recording, preservation, and salvage of such historical property or value. Nothing in this section shall be construed to limit the expenditure of more than one per cent of the project appropriations for the purposes herein stated should an additional amount be necessary and mutually agreed to by the department and the government agency planning the construction or improvement.