Prohibits, after 6/30/2026, the importation or storage of liquefied natural gas; the construction, expansion, or operation of liquefied natural gas infrastructure; and state agencies or counties from issuing a permit or lease that enables the development or expansion of liquefied natural gas, with certain exemptions. Authorizes the Public Utilities Commission and Department of Health to adopt rules for the enforcement and compliance of the prohibition. Repeals a provision from the Hawaii State Planning Act making it a policy of the State to use liquefied natural gas as a transitional, limited-term replacement of petroleum. Prohibits, after 6/30/2026, the approval of a new or renewed purchase agreement that proposes to supply a utility with liquefied natural gas and the modification of an existing liquefied natural gas purchase agreement that proposes to extend the term or increase the amount of liquefied natural gas that is supplied under the existing agreement.