No registration certificate shall be transferable except where the business taxed is transferred, whether by sale or otherwise, to another person under such circumstances that the real or ultimate ownership of the business after the transfer is substantially similar to the real or ultimate ownership existing before the transfer. For the purposes of this section, stockholders, bond-holders, partners, or other persons holding an interest in a corporation or other entity herein defined to be a person are regarded as having the real or ultimate ownership of such corporation or other entity.