The Organization Act of the Audit Divisions and Offices Article 7

The Audit Divisions (Offices) shall be divided into level 1 and level 2 in accordance with the complexity of functions. The National Audit Office shall report the levels of Audit Divisions (Offices) to the Control Yuan for approval.
中文原文 審計處室組織通則第7條
各審計處、室視業務繁簡,分為一、二等,由審計部報請監察院核定之。

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