Regulations Governing Permission and Management of Homemade Hunting Guns and Spear Guns of Indigenous Peoples and Fishermen Article 28

If the approval document for the primary components of a homemade hunting gun, ammunition, or the license for a homemade hunting gun or spear gun is lost or damaged, the possessor must apply to the municipal or county (city) police department with jurisdiction over the storage place for a replacement license within fifteen days following the day when the loss or damage occurs.If a homemade hunting gun, its primary components, ammunition, or a homemade spear gun is lost or stolen, the possessor or safe keeper must report it to the police within three days and shall turn in the license or cancel the registration at the municipal or county (city) police department which has jurisdiction over the storage place.In the case of loss or theft of the homemade hunting gun, its primary components, ammunition, or the homemade spear gun as prescribed in the preceding paragraph, the municipal or county (city) police department which has jurisdiction over the storage place shall notify all police agencies nationwide for assistance in locating the items and cc the Ministry of the Interior.
中文原文 原住民漁民自製獵槍魚槍許可及管理辦法第28條
自製獵槍主要組成零件、彈藥之許可文件、自製獵槍或自製魚槍執照遺失或毀損時,持有人應於事實發生之翌日起十五日內,向保管地之直轄市、縣(市)政府警察局申請補發執照。
自製獵槍、其主要組成零件、彈藥或自製魚槍遺失或遭竊後,持有人或保管人應於三日內向警察機關報案,並向保管地之直轄市、縣(市)政府警察局辦理報繳執照或註銷登記。
前項自製獵槍、其主要組成零件、彈藥或自製魚槍之遺失或遭竊情形,應由保管地之直轄市、縣(市)政府警察局通報全國各警察機關協尋,並副知內政部。

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