Water Act Article 83-6

If one of the following circumstances occurs after the runoff allocation plan is implemented, the authority-in-charge may review and modify it as required:1.Significant changes in hydrological conditions or topography or damage to public facilities due to natural disasters or other major events.2.A major public facility or utility plan developed by the government.3.The formulation or modification of the national spatial plan, regional plan or urban plan.The procedures for modifying the runoff allocation plan referred to in the preceding paragraph shall be governed by the procedures prescribed in Articles 83-2 and 83-4.