Regulations for the Approval and Management of Employment of Foreign Nationals by Embassies, Consulates, Foreign Offices, International Organizations, and their Personnel in the Republic of China (Taiwan) Article 3

The number of foreign employees, foreign attendants, and foreign members of the private staff that may be employed by an embassy, consulate, foreign office, international organization, and its personnel thereof shall be determined in accordance with the following guidelines:1. Foreign employees: the Ministry of Foreign Affairs shall approve the employment of a reasonable number of foreign employees according to its assessment of the practical needs of an embassy, consulate, foreign office, or international organization.2. Foreign attendants and foreign members of the private staff: A head of an embassy, consulate, foreign office, or international organization shall be allowed a maximum of two foreign attendants and foreign members of the private staff, and other official staff members shall each be allowed one member of the private staff. Actual authorized employment quotas shall be defined according to the principle of mutual reciprocity.
中文原文 駐華使領館外國機構國際組織及其人員聘僱外國人許可及管理辦法第3條
駐華使領館、外國機構、國際組織及其人員,可聘僱之外籍雇員、外籍隨從及外籍僕役人數,應依下列各款規定辦理:
一、外籍雇員:外交部得視駐華使領館、外國機構及國際組織之實際需要於合理範圍內許可之。
二、外籍隨從及僕役:駐華使領館、外國機構及國際組織主管以二人為限,其餘正式職員以一人為限。
實際核准聘僱數額,應依互惠原則辦理。

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