(1) Every corporation organized for any purpose under any general or special law of this State and every foreign corporation authorized to transact business in this State shall continuously maintain a registered office in this State, and a registered agent having a business office identical with such registered office.
(2) The registered office may be, but need not be, the same as a place of business of the corporation which it serves.
(3) The registered agent may be a natural person of the age of 18 years or more, or a domestic corporation or a foreign corporation authorized to transact business in this State, whether or not any such agent corporation is organized for a purpose or purposes for which a corporation may be organized under this act.
(4) The designation of a principal or registered office in this State and of a registered agent in charge thereof by any corporation of this State or by any foreign corporation authorized to transact business in this State, as in force on the effective date of this act, shall continue with like effect as if made hereunder until changed pursuant to this act.