Water Pollution Control Act Article 15

The validity period for discharge permits and simple discharge permit documents shall be five years. Those that still wish to continue to use their permits or permit documents after expiration shall, within the five-month period starting six months prior to expiration, apply to the special municipality, county or city competent authority for the approval of an extension. Each extension may not exceed five years.When there is concern with ecological or human health risks due to the deterioration of water quality within the validity period of a discharge permit or simple discharge permit document in the foregoing paragraph, and the special municipality, county or city competent authority consider that the items in the permit shall not be able to protect the water bodies or the risks may be harmful for the public welfare, the authority shall modify permit items or cancel a permit or permit document.