The Coast Guard Act Article 4
While performing the duties specified in the preceding paragraph, the personnel of the Coast Guard may exercise the following powers without exceeding the extent of necessary:1.Conduct security inspections on personnel, vessels, vehicles, other means of transport, or carried goods arriving at or departing from trading ports, on suspicion of their violation of the security law, when such suspicion is justified2.Inspect inbound or outbound vessels or other means of transport or carried persons/goods at the Waters, the Coast, estuaries or non-trading ports, or any of these in the territorial waters, on suspicion of their violation of the law, when such suspicion is justified3.Order vessels sailing at the Waters to show their identification documents, navigation records and any other navigation-related data, on suspicion of their violation of the law, when such suspicion is justified4.Order vessels or other means of transport sailing at the Waters to stop sailing or return to port, on the basis of their appearance, flags, navigation modes, carried personnel or any other abnormal behavior, on suspicion of their violation of the law, when such suspicion is justified. In the event of disobedience, the personnel of the Coast Guard may enforce their commands by force. Nonetheless, the purpose of the use of force shall be nothing more than preventing a vessel or other means of transport from proceeding with its voyage5.Pursue, board, inspect and/or expel, and even arrest, detain or have a lien upon, if necessary, a vessel or other means of transport sailing at the Waters, when it jeopardizes the interests, the order or the navigational safety of the Waters of the Republic of China6.Perform other duties required by laws, treaties, agreements or international lawsThe personnel of the Coast Guard may, in an emergency, request neighboring vessels and the vessels’ personnel to assist them in exercising the aforesaid powers.
中文原文 海岸巡防法第4條
海巡機關人員執行職務時，得行使下列職權。
但不得逾越必要程度：
一、對進出通商口岸之人員、船舶、車輛或其他運輸工具及載運物品，有正當理由，認有違反安全法令之虞時，得依法實施安全檢查。
二、對進出海域、海岸、河口、非通商口岸、航行領海內之船舶或其他運輸工具及其載運人員、物品，有正當理由，認有違法之虞時，得依法實施檢查。
三、對航行海域內之船舶或其他運輸工具，有正當理由，認有違法之虞時，得命船舶出示船舶文書、航海紀錄及其他有關航海事項之資料。
四、對航行海域內之船舶或其他運輸工具，根據船舶外觀、國籍旗幟、航行態樣、乘載人員及其他異常舉動，有正當理由，認有違法之虞時，得命船舶或其他運輸工具停止航行、回航，其抗不遵照者，得以武力令其配合。
但武力之行使，以阻止繼續行駛為目的。
五、對航行海域內之船舶或其他運輸工具，如有損害中華民國海域之利益及危害海域秩序行為或影響安全之虞者，得進行緊追、登臨、檢查、驅離；必要時，得予逮捕、扣押或留置。
六、其他依法令、條約、協定或國際法規定得行使之職權。
海巡機關人員執行前項職權，若有緊急需要，得要求附近船舶及人員提供協助。
但不得逾越必要程度：
一、對進出通商口岸之人員、船舶、車輛或其他運輸工具及載運物品，有正當理由，認有違反安全法令之虞時，得依法實施安全檢查。
二、對進出海域、海岸、河口、非通商口岸、航行領海內之船舶或其他運輸工具及其載運人員、物品，有正當理由，認有違法之虞時，得依法實施檢查。
三、對航行海域內之船舶或其他運輸工具，有正當理由，認有違法之虞時，得命船舶出示船舶文書、航海紀錄及其他有關航海事項之資料。
四、對航行海域內之船舶或其他運輸工具，根據船舶外觀、國籍旗幟、航行態樣、乘載人員及其他異常舉動，有正當理由，認有違法之虞時，得命船舶或其他運輸工具停止航行、回航，其抗不遵照者，得以武力令其配合。
但武力之行使，以阻止繼續行駛為目的。
五、對航行海域內之船舶或其他運輸工具，如有損害中華民國海域之利益及危害海域秩序行為或影響安全之虞者，得進行緊追、登臨、檢查、驅離；必要時，得予逮捕、扣押或留置。
六、其他依法令、條約、協定或國際法規定得行使之職權。
海巡機關人員執行前項職權，若有緊急需要，得要求附近船舶及人員提供協助。