I would also mention that under the ROC Labor Laws, including the Employment Services Act, as well as the Immigration Law, Statue Governing Issuance of ROC Visas on Foreign Passports, Regulations Governing Visiting, Residence, and Permanent Residence of Aliens, etc., etc. a dual passport holder under ROC law WHO ENTERS THE ROC ON A FOREIGN PASSPORT IS CONSIDERED TO BE A CITIZEN OF THAT COUNTRY.
Thus, there is much solid legal reasoning to say that the conscription of a dual passport holder (USA - ROC) who entered the Taiwan area on a US passport is illegal under Taiwan law. At the least, there is a severe conflict of laws here which should be resolved by a judge.
In terms of the remedies which a court action could achieve, at the minimum the person involved should be allowed to leave the country. I also suspect that certain changes in the ROC conscription laws would be required.
Many people assume that the Taiwan Relations Act is a legal act between the USA and the Taiwan authorities, but it is actually much more than that. The TRA defines Taiwan’s status under international law. As a previous poster noted, Taiwan has no dejure rights to sovereignty, hence the entire basis of its military conscription rules is questionable.
I would also note that I have attended many Legislative Yuan conferences on this (and related) ROC military conscription issues, and the people who complained the most loudly were the Taiwanese parents of the dual passport holding young men who were seeing their work, graduate school, and other plans abruptly cut off due to this unexpected military conscription problem. They had assumed (based on legal advice from local lawyers, in no small part hinging on the stipulations in the laws quoted in my first paragraph, I suspect) that entering Taiwan on a US passport for some period of time did not complicate them in any way, shape, or form to ROC military conscription. They had quite a rude awakening when they found out otherwise.
After an LY conference in April of this year, I did submit several formal proposals for revisions to the Statue Governing Issuance of ROC Visas on Foreign Passports and Military Conscription Law to some DPP legislators. In my proposed revisions, Overseas ROC Offices would be barred from issuing visas to dual nationality males of military age who applied for such visas with A FOREIGN PASSPORT. This would eliminate the problem/confusion at its source, and I believe would be a solution acceptable to all parties. I am unaware if my proposed revisions will be able to go to committee when the Legislative Yuan goes back to work in September, 2002.