You might have already been here before, but the following website should answer most residency application Q's:
http://mus.edu/residency/default.asp.
If you have more questions, e-mail Laurie Tobol:
[email protected].
In regards to your date of MT residency starting, read the following (from the website above):
The 12-month period referred to in subsection B does not begin to run until an act indicative of intent to become a Montana resident is taken. The following will serve as such indicators:
(a) an automobile belonging to the person seeking in-state status is registered in Montana, (b) a Montana driver's license is acquired, (c) a Montana voter registration is acquired, (d) a principal residence is purchased,
(e) a resident Montana individual income tax return is filed.
So, choose one of those five acts that you have done and track your physical presence for the twelve months following that act. Oh, and being outside MT for more than thirty days in that year is fine if you were out of the state for educational purposes. I was accepted to the E-'10 class as MT TRUST and was not hurt by attending a private college in the midwest. Again, do not be shy to e-mail Laurie Tobol w/ questions.