Taking path 1, 3 or 4 described above, upon staying in Taiwan for 1 year, or 2 consecutive years (over 270 days each year), or 5 consecutive years (over 183 days each year), NWOHR can apply for naturalization.
Taking path 2 described above, upon staying in Taiwan for 3 consecutive years, or 5 consecutive years (over 270 days each year), or 7 consecutive years (over 183 days each year), NWOHR can apply for naturalization.