12D.5  Cancellation of agreements.
  A participant may cancel a participation agreement at will. Upon cancellation of a participation agreement, a participant shall be entitled to the return of the participant’s account balance.
98 Acts, ch 1172, §5; 99 Acts, ch 96, §1; 99 Acts, ch 122, §6, 7, 10; 2003 Acts, ch 142, §1, 11; 2004 Acts, ch 1079, §10, 17