Any life insurance company organized under the laws of another state, and admitted to do business in the state of Missouri, shall have power to invest its capital, reserve and surplus funds in the same manner, to the same extent and in the same investments as are permitted to domestic life insurance companies organized under the laws of this state; provided, that nothing herein contained shall be so construed as to prohibit any such foreign company from investing its capital, reserve and surplus funds as permitted by its charter and the laws of its domiciliary state.