The Law of Ships Article 48
After a ship is assigned a load line or undergoes special inspection, the ship owner shall apply for periodical inspection every one full year within three months before and after the assignment or inspection. The certificate shall be endorsed by the shipping administration authority at the port of calling when the results of periodical inspections are considered satisfactory.
中文原文 船舶法第48條
船舶載重線經勘劃或特別檢查後，船舶所有人應於每屆滿一年之前後三個月內申請施行定期檢查；船舶所在地航政機關應於定期檢查合格後，在船舶載重線證書上簽署。