(1) This part provides procedures and criteria by which the parent-child legal relationship:
(a) may be terminated by a court if the relationship is not in the best interest of the child; or
(b) may be reinstated by a court when permanency has not been achieved for a child, the child and parent desire reinstatement, and reinstatement is in the best interest of the child.
(2) The termination of the parent-child legal relationship provided for in this part is to be used in those situations when there is a determination that a child is abused or neglected, as defined in 41-3-102.