Mont. Code Ann. § 70-23-603

Subsequent to recording a declaration and while the property remains subject to this chapter, no lien shall arise or be effective against the property. During such period liens or encumbrances shall arise or be created only against each unit and the undivided interest in the common elements appertaining thereto, in the same manner and under the same conditions as liens or encumbrances may arise or be created upon or against any other separate parcel of real property subject to individual ownership.