Marine Environment Classification and Marine Environment Quality Standards Article 7

Once the marine environment has been self-purified to reach the relevant marine environment quality standards, the marine environmental classifications and the relevant environment standard values shall not be lowered.The central competent authority may review and amend these current Standards every three years.
中文原文 海域環境分類及海洋環境品質標準第7條
海域環境經自淨後達到相關海洋環境品質標準時,即不得降低其海域環境分類及相關環境標準值。
中央主管機關得於每三年檢討修正本標準。

English translation for reference only; the Chinese text prevails. Not legal advice.