Section 121-105. Registered agent

(a) In addition to the designation of the
  secretary  of  state,  each  limited  partnership  or authorized foreign
  limited partnership may designate a registered agent upon  whom  process
  against  the  limited partnership may be served. The agent must be (i) a
  natural person who is a resident of this state or has a business address
  in this state, or (ii) a domestic corporation or a  foreign  corporation
  authorized to do business in this state.
    (c)  The  registered agent of a limited partnership may resign as such
  agent. The registered agent shall file a certificate with the department
  of state entitled, "Certificate of resignation of registered agent of...
  (name of designating  limited  partnership)  under  subdivision  (c)  of
  section  121-105  of the Revised Limited Partnership Act" which shall be
  executed by such registered agent. It shall set forth:
    (1) The name of the limited partnership, and if it has  been  changed,
  the  name  under  which  it was organized. A foreign limited partnership
  must set forth its name and the  fictitious  name  the  foreign  limited
  partnership  has agreed to use in this state pursuant to section 121-902
  of this article.
    (2) The date the certificate of limited partnership or certificate  of
  application  for  authority  of the limited partnership was filed by the
  department of state.
    (3) That he resigns as registered agent for the limited partnership.
    (4) That he has sent a copy  of  the  certificate  of  resignation  by
  registered mail to the limited partnership at the post office address on
  file  in the department of state specified for the mailing of process or
  if such address is the address of the  registered  agent,  then  to  the
  office  of  the  designating limited partnership and the jurisdiction of
  its organization.
    (d) The designation of a registered agent shall terminate thirty  days
  after  the  filing  by  the  department  of  state of the certificate of
  resignation. A certificate designating a new  registered  agent  may  be
  delivered  to  the department of state by the limited partnership within
  the thirty days or thereafter.