Taiwan
Answer ... Any third party.
Taiwan
Answer ... Within three months of the publication/registration date of the trademark (publication and registration occur on the same day).
Taiwan
Answer ... The Taiwan IP Office (TIPO).
Taiwan
Answer ... Opposition proceedings in Taiwan are conducted on a pleading and defence basis, whereby the two parties are allowed to alternately present their arguments in written form. Upon receipt of a brief/counterstatement lodged by one party, TIPO will serve a copy thereof on the other party along with a notification for response before a designated deadline, which is generally within 30 days. This procedure will continue until the two parties have exhausted their views and have no further observations or new evidence to file.
Taiwan
Answer ... Yes; see questions 4.2 and 4.3.