A subpoena remains in effect unless quashed or until judgment, dismissal, or other final determination of the action by the court in which the action was filed or to which the action was transferred.
Mont. Code Ann. § 26-2-111
Time during which subpoena is effective
En
Official source: Montana Code Annotated (Montana Legislature). Reproduced from public-domain Montana statutes; confirm against the official source for the current text. Not legal advice.