Official Seals Act Article 9

If a civil servant at the senior rank or above, or a military chief of staff at the rank of general or admiral, is required to use office seals to perform their duties, an application may be submitted to the President to approve the issuance of an office seal. If it is necessary for the official to issue external documents, the President may be petitioned to approve the issuance of a permanent organization seal or a temporary/special organization seal.
中文原文 印信條例第9條
文職簡任以上,武職將級之幕僚長,為辦理公務有使用職章之必要時,得層請總統核准製發職章;其有對外行文之必要者,並得呈請總統核准製發印或關防。

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