Montana Title 40. Family Law § 40-4-221. Determination of child's care upon death of parent

(a) the natural parent;

(b) the surviving spouse of the deceased parent;

(c) a person nominated by the will of the deceased parent;

(d) any person nominated by the child if the child is at least 12 years old;

(e) any other person if that person has actual physical control over the child;

(f) a person who has established with the child a child-parent relationship, as defined in 40-4-211;

(g) any other party whom, upon showing of good cause, the court permits to intervene as an interested party.