No certificate of incorporation shall be delivered to a China Trade Act corporation and no incorporation shall be complete until at least 25 per centum of its authorized capital stock has been paid in cash, or, in accordance with the provisions of section
148 of this title, in real or personal property which has been placed in the custody of the directors, and such corporation has filed a statement to this effect under oath with the registrar within six months after the issuance of its certificate of incorporation, except that the registrar may grant additional time for the filing of such statement upon application made prior to the expiration of such six months. If any such corporation transacts business in violation of this subdivision of this section or fails to file such statement within six months, or within such time as the registrar prescribes upon such application, the registrar shall institute proceedings under section
154 of this title for the revocation of the certificate.