(a) A limited partnership's registered agent is the limited partnership's agent for service of process, notice or demand required or permitted by law to be served on the limited partnership.

(b) Whenever a domestic or foreign limited partnership authorized to do business in this state fails to appoint or maintain a registered agent in this state, whenever its registered agent cannot be found with reasonable diligence, whenever a foreign limited partnership shall transact business or conduct affairs in this state without first submitting an application for registration with the secretary of state, or whenever the registration of a foreign limited partnership shall have been cancelled, then the secretary of state shall be an agent of such limited partnership upon whom any such process, notice or demand may be served.

(c) Whenever a domestic or foreign limited partnership authorized to do business in this state is an employer within the meaning of the Workers' Compensation Law, compiled in title 50, chapter 6, and such limited partnership is, for the purpose of such workers' compensation, self-insured or a part of a self-insurance pool as provided in title 50, chapter 6, part 4, such limited partnership shall, for workers' compensation actions only, be required to appoint the commissioner of commerce and insurance and his chief deputy, or their successors, as its true and lawful attorneys upon either of whom all lawful process in any such action or legal proceeding may be served, as is required of insurance companies by § 56-2-103.

(d) This section does not prescribe the only means, or necessarily the required means, of serving a limited partnership.