This state permits only its residents to use its exemptions. “A
resident of this state is entitled to the exemptions provided in
this part.” Mont. Code Ann. § 25-13-606.
In re Urban, 361 B.R.
910, (Bankr.D.Mont.2007).

Therefore, if it is the applicable state (as determined by the
method stated on the home page of this site), its exemptions
may be used only if the debtor is a resident of this state on the
date of filing bankruptcy.