(a) If the conservator with the exclusive right to designate the primary residence of the child is ordered to military deployment, military mobilization, or temporary military duty, the court may render a temporary order to appoint a designated person to exercise the exclusive right to designate the primary residence of the child during the military deployment, military mobilization, or temporary military duty in the following order of preference:
(1) the conservator who does not have the exclusive right to designate the primary residence of the child;
(2) if appointing the conservator described by Subdivision (1) is not in the child’s best interest, a designated person chosen by the conservator with the exclusive right to designate the primary residence of the child; or
(3) if appointing the conservator described by Subdivision (1) or the person chosen under Subdivision (2) is not in the child’s best interest, another person chosen by the court.
(b) A nonparent appointed as a designated person in a temporary order rendered under this section has the rights and duties of a nonparent appointed as sole managing conservator under § 153.371.

(c) The court may limit or expand the rights of a nonparent named as a designated person in a temporary order rendered under this section as appropriate to the best interest of the child.