Land Surveying and Mapping Act Article 34

Professional survey engineers and surveyors who run the survey industry or are employed to practice in the sector should regard themselves as full-time continuous employees who should focus on practicing the surveying and mapping business in the sector and are prohibited to be engaged in any part-time work or job position. However, this restriction does not apply to professional survey engineers and surveyors who are recognized by the central authority concerned to be able to work part-time in teaching, doing researches, conducting disaster inspections, appraisals and doing other businesses or holding other job positions.Should the owner of the survey industry become aware that the professional survey engineers and surveyors violate the previous regulation (regarding the full-time employment), the owner should notify the full-time professional survey engineers and surveyors to resign from his/her part-time job or business before a certain deadline. Those who do not resign when the deadline is met will be fired from his/her full-time employment.
中文原文 國土測繪法第34條
經營或受聘於測繪業之測量技師及測量員,為專任之繼續性從業人員,應在該測繪業執行業務,不得兼任其他業務或職務。
但經中央主管機關認可之兼任教學、研究、勘災、鑑定或其他業務、職務者,不在此限。
測繪業負責人知其專任之測量技師及測量員有違反前項規定之情事者,應通知其專任之測量技師及測量員限期就兼任工作、業務辦理辭任;屆期未辭任者,應予解任其專任工作。

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