(a) A person may not act as an insurer and an insurer may not transact insurance in this state except as authorized by a subsisting certificate of authority issued to it by the director, except as to transactions that are expressly otherwise provided for in this title.
(b) An insurer may not have or maintain in this state an office, representative, or other facility for the solicitation or servicing of any kind of insurance in another state unless the insurer is authorized to transact the same kind of insurance in this state.