(1) A disaster declaration may be issued by order or resolution whenever the principal executive officer determines a disaster is occurring or has occurred. (2) A disaster declaration may be terminated when the principal executive officer determines that the disaster conditions no longer exist.
Local Disaster -- Declaration And Termination
Mont. Code Ann. § 10-3-403, under Local and Interjurisdictional Planning and Execution.
Mont. Code Ann. § 10-3-403