The Forestry Act Article 44

A harvester of national or public forests shall keep an account book documenting the yield of each species, the volume, origins and distribution channels.The said harvester shall choose a mark or seal to identify their forest products. The mark or seal shall be filed with the local government agency, and it shall be used before the forest products are moved out of the forest.The harvester, as defined in paragraph 1 herein, may not use a mark or seal that is similar or identical to the previously filed mark or seal of other harvesters.
中文原文 森林法第44條
國、公有林林產物採取人應設置帳簿,記載其林產物種類、數量、出處及銷路。
前項林產物採取人,應選定用於林產物之記號或印章,申報當地主管機關備案,並於林產物搬出前使用之。
第一項林產物採取人不得使用經他人申報有案之相同或類似記號或印章。

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