Emancipation is a legal term to describe a minor’s release from the custody and control of his or her parents or guardian.  Emancipation automatically occurs when a person turns 18, but the Court can grant a limited emancipation order for individuals between ages 16 and 18. 

MCA Title 41, Ch. 1, Part 5. Limited Emancipation

Emancipation of a Minor[montanalawhelp.org] Informational Article.

Montana G218 [Guide to Turning 18] from the State Bar of Montana, Law Related Education Committee