Section 121-603. Withdrawal of a limited partner

(a) A limited partner may
  withdraw from a limited partnership at the time or upon the happening of
  events specified in the partnership agreement and in accordance with the
  partnership  agreement.   Notwithstanding anything to the contrary under
  applicable law, unless a partnership  agreement  provides  otherwise,  a
  limited partner may not withdraw from a limited partnership prior to the
  dissolution  and  winding up of the limited partnership. Notwithstanding
  anything to the contrary under applicable law, a  partnership  agreement
  may provide that a partnership interest may not be assigned prior to the
  dissolution and winding up of the limited partnership.
    (b)  A  limited  partnership  whose  original  certificate  of limited
  partnership was filed with the secretary of state and effective prior to
  the effective date of this subdivision shall continue to be governed  by
  this section as in effect on such date and shall not be governed by this
  section, unless otherwise provided in the partnership agreement.