A certificate of authority shall not be required of an insurer with respect to the following:
(1) Investigation, settlement or litigation of claims under its policies lawfully written in this State or liquidation of assets and liabilities of the insurer (other than collection of new premiums), all as resulting from its former authorized operations in this State;
(2) Transactions thereunder subsequent to issuance of a policy covering only subjects of insurance not resident, located or expressly to be performed in this State at time of issuance and lawfully solicited, written and delivered outside this State;
(3) Prosecution or defense of suits at law;
(4) Transactions pursuant to surplus lines coverages lawfully written under Chapter 19 of this title;
(5) Reinsurance, except as to domestic reinsurers;
(6) Underwriting-membership in a regulated insurance exchange.
(7) An automobile club so long as its activities are restricted to those defined in § 1707(b)(4) of this title.