Thank you for your comment and the constructive discussion. Indeed, not all institutions fall under this category, as certain competencies are vested in federal agencies. However, two of the three branches of democratic authority do. The designation Hercegbosanska županija is used by the majority of media outlets operating in the region and by more than two-thirds of its population. My position is that, in accordance with established OpenStreetMap practices, it is appropriate to employ the terminology that is most commonly recognized and used within the relevant territorial jurisdiction.