The Law of Ships Article 42
When the ship's type, arrangement or capacity has been altered, or its tonnage measurement or calculation is found incorrect after the ship owner has registered the ship, an application for re-measurement and reissuance of the Tonnage Certificate shall be made. Where such alteration or incorrection is found by the shipping administration authority, the authority shall undertake the re-measurement and reissuance of the Tonnage Certificate.
中文原文 船舶法第42條
船舶所有人於船舶登記後，遇有船身型式、佈置或容量變更，或察覺丈量及噸位計算有錯誤時，應申請重行丈量並換發船舶噸位證書；其由航政機關發覺者，應由該機關重行丈量並換發船舶噸位證書。