Where principal to be secured by a revolving mortgage has been determined pursuant to the provisions of Article 398-19, paragraph (2) or Article 398-20, paragraph (1), item (iii) or item (iv) of the Civil Code, notwithstanding the provisions of Article 60, an application for a registration of the determination of principal may be filed independently by the registered holder of the revolving mortgage; provided, however, that where principal to be secured by a revolving mortgage has been determined pursuant to the provisions of Article 398-20, paragraph (1), item (iii) or item (iv) of the Civil Code, an application for a registration of such determination of principal must be filed along with an application for a registration of acquisition of the revolving mortgage or the right established thereon.