Regulations Governing Foreign Currency Bond Brokerage, Proprietary Trading, and Investment by Bills Finance Companies Article 8

Each bills finance company shall set its own upper limit on foreign currency risk within the limit of 15 percent of its net worth, and shall report it to the Central Bank for approval.The term "upper limit on foreign currency risk" in the preceding paragraph means the net position in foreign currency assets minus foreign currency liabilities, plus positions in financial derivatives.When the calculation of any limit under these Regulations involves currency conversion, the bills finance company shall calculate it using the closing foreign exchange rate posted by its designated major correspondent bank, and shall follow the consistency principle.
中文原文 票券金融公司辦理外幣債券經紀自營及投資管理辦法第8條
票券金融公司之外幣風險上限,由各票券金融公司於淨值百分之十五之限額內自行訂定,並報經中央銀行同意。
前項所稱外幣風險上限,指外幣資產扣減外幣負債之淨部位,加衍生性金融商品部位。
本辦法各項限額之計算,涉及幣別轉換時,票券金融公司應依主要往來指定銀行牌告外匯收盤匯率,並符合一致性原則計算之。

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