This article examines the sustainability of customary values and cultural heritage of Kepaksian Buay Pernong in West Lampung as part of the Paksi Pak Sekala Brak entity. This study aims to explore the historical, cultural, and customary values inherited by Kepaksian Buay Pernong from the 12th century to the present. Using a descriptive qualitative approach and in-depth interview method with Ki Demang Ruskan as the khalis Lamban Bandung guide, this study reveals the history of the formation of kepaksian, the preservation of customary values, and the challenges in facing the modern era. The results of the study show that despite experiencing various social and cultural dynamics, Kepaksian Buay Pernong still maintains the customary structure, title-granting system, and the existence of ancestral heirlooms as an integral part of the identity of the Sai Batin community as well as the nation's cultural heritage.
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