Obviously, the laws about this are the same throughout the island. However, determining the applicability in your case will probably require a written inquiry to the local county or city government.
As a trial research project, I called the Taipei City Government this morning. First I tried the Bureau of Education. The department in charge of bushiban matters assured me that teachers are indeed covered by the Labor Standards Law. However, he suggested that I call the Bureau of Labor Affairs for a clarification of the details.
When I called the Bureau of Labor Affairs (BLA), the person at the Information Desk there, tel: (02) 2720-8889 ext. 1002, checked his lawbooks and other reference materials and said “Teachers in a bushiban are not covered by the Labor Standards Law.”
(So, this is Taiwan. Personally, I prefer not to make telephone inquiries about any matters of consequence. It is better to have your Chinese friends help you type out a formal letter and send to the local city or county government for a formal reply.)
The person in the BLA did make another interesting statement however. He said that regardless of whether you are covered by the Labor Standards Law, you can still drop by their department to lodge a grievance against a local employer. If necessary, they will arrange a formal meeting so that both sides can discuss and negotiate the situation in front of a BLA representative.
I assume that all local city and county governments would have similar services.