The Forestry Act Article 18

Public and private forests with a commercial forest area of more than five hundred (500) hectares shall have a licensed forestry technician.Forest planters and loggers shall be assisted by forestry technicians or forestry technical staff.
中文原文 森林法第18條
公有林、私有林之營林面積五百公頃以上者,應由林業技師擔任技術職務。
造林業及伐木業者,均應置林業技師或林業技術人員。

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