Regulations of the Land Registration Article 43

When there is more than one obligee for the application for registration, the fair share or the mutual relationship of rights shall be clearly written within the application form.The fair share referred to in the preceding paragraph shall be indicated by a fraction, of which the numerator and denominator shall not be decimals and the denominator shall be indicated by intact tens, hundreds, thousands or ten thousands in principle, and no more than six digits.If the indication of the shares of any registered co-owned land rights is not in accordance with the provisions referred to in the preceding paragraph, the registration agency may notify the landowners to reach an agreement by themselves within 30 days; then the registration of rectification may be, mutatis mutandis, carried out. If after the notification, the co-owners fail to reach an agreement after the time limit, the registration agency itself shall report to a higher organ for approval to correct it.
中文原文 土地登記規則第43條
申請登記,權利人為二人以上時,應於登記申請書件內記明應有部分或相互之權利關係。
前項應有部分,應以分數表示之,其分子分母不得為小數,分母以整十、整百、整千、整萬表示為原則,並不得超過六位數。
已登記之共有土地權利,其應有部分之表示與前項規定不符者,得由登記機關通知土地所有權人於三十日內自行協議後準用更正登記辦理,如經通知後逾期未能協議者,由登記機關報請上級機關核准後更正之。

English translation for reference only; the Chinese text prevails. Not legal advice.