subprefectural
Subprefectural refers to an administrative division that is subordinate to a prefecture. Prefectures are a common type of administrative region in many countries, often forming the primary level of subnational government. A subprefecture, therefore, represents a secondary or lower-tier administrative unit within a prefecture.
The specific powers, responsibilities, and organizational structure of subprefectures can vary significantly depending on the country
In other contexts, subprefectural divisions might be more akin to districts or counties within a larger prefecture.