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This white paper presents a governance-focused analysis of emergency medical services (EMS) delivery in frontier and rural environments, with specific application to the State of Montana. It examines the structural limitations of conventional rural classification systems, arguing that reliance on population density and geographic designation alone obscures critical operational realities affecting patient care, workforce burden, and system performance. The central concept advanced in this work is that exposure, defined as the duration of time a patient remains under EMS responsibility prior to definitive care, is the primary governing variable in frontier emergency medical systems. Through this lens, the paper identifies how prolonged transport times, limited resource availability, and dispersed infrastructure create conditions of ungoverned clinical continuity, where responsibility persists without corresponding institutional support or regulatory alignment. Drawing on operational data and system-level observations from Powder River County, Montana, this report illustrates how exposure duration functions as a driver of clinical risk, workforce strain, and governance misalignment. These findings are contextualized within existing state-level assessments, including Montana’s 2021 Crisis on the Horizon report, to ensure alignment with current policy understanding while extending the analytical framework. This document is intentionally diagnostic and non-prescriptive. It does not propose statutory or regulatory changes, expand clinical scope of practice, or establish clinical protocols. Instead, it seeks to provide a structured analytical foundation for understanding the limitations of current classification models and to support future discussion regarding governance alignment in delayed-access emergency care systems. This white paper was prepared for the Montana Department of Public Health and Human Services (DPHHS) EMS & Trauma Systems Section and is made publicly available to support broader professional, academic, and policy discussion.