Act Governing Relations between the People of the Taiwan Area and the Mainland Area Article 21

Except otherwise provided for in any other law, any of the people of the Mainland Area permitted to enter into the Taiwan Area may not register itself as candidate for any public office, serve in the government, educational institutions or state enterprises, or organize any political party unless it has had a household registration in the Taiwan Area for at least ten years; unless it has had a household registration in the Taiwan Area for at least twenty years, it may not serve in the intelligence agencies or institutions, or serve in the national defense agencies or institutions as any of following personnel:1. Recruited military officers, sergeants and soldiers.2. Drafted military officers and sergeants.3. Civilian, educational and military contracted personnel.Any of the people of the Mainland Area who is permitted to enter into the Taiwan Area and has a household registrations in the Taiwan Area may serve as faculty member of any university, researcher of any academic or research institution, or specialist of any social education institution according to relevant laws and regulations without being subject to the limitation to have a household registration in the Taiwan Area for at least ten years as referred to in the preceding paragraph.Any person referred to in the preceding paragraph shall not assume any responsibility or perform any work involving national security or confidential science-tech research.