(1) The term significant subsidiary means a subsidiary, including its subsidiaries, which meets any of the conditions in paragraph (w)(1)(i), (ii), or (iii) of this section; however if the registrant is a registered investment company or a business development company, the tested subsidiary meets any of the conditions in paragraph (w)(2) of this section instead of any of the conditions in this paragraph (w)(1). A registrant that files its financial statements in accordance with or provides a reconciliation to U.S. Generally Accepted Accounting Principles (U.S. GAAP) must use amounts determined under U.S. GAAP. A foreign private issuer that files its financial statements in accordance with International Financial Reporting Standards as issued by the International Accounting Standards Board (IFRSIASB) must use amounts determined under IFRSIASB.
17 CFR § 210.1-02
Unless the context otherwise requires, terms defined in the general rules and regulations or in the instructions to the applicable form, when used in Regulation S-X (this part 210), shall have the respective meanings given in such instructions or rules. In addition, the following terms shall have the meanings indicated in this section unless the context otherwise requires.