One peculiarity was the village’s Imperial immediacy and Imperial Statehood, which gave Grumbach a seat and a vote at the Imperial Diet ("Reichstag"), which supposedly likewise lasted until the Empire’s downfall; this was unique among places now within the Kusel district, and was the result of a 1475 Imperial edict raising the Dhaun-Grumbach line to Imperial Counts. In this time, an administrative structure began to form in which "Amt" and state administration, the latter in the form of the chancellery, each had its seat in Grumbach. This structure was supposedly preserved well beyond feudal times, characterizing the village in increasing measure until in the course of administrative restructuring in Rhineland-Palatinate in 1969-1972 it abruptly met its end. The lordship’s presence over the village likewise abruptly met its end when French troops came marching in during the upheavals brought about by the French Revolutionary Wars in the 1790s, whereafter Grumbach was "de facto" a part of France, but this became "de jure" under international law by the terms of the 1801 Treaty of Lunéville. The Rhinegraves of Grumbach, meanwhile, who had been forced into flight before the Revolutionary tide early in 1793, were richly compensated by the Extraordinary Imperial Deputation at Regensburg in 1802-1803 for the lands on the Rhine’s left bank that they had lost to the French, by being granted, through their delegates’ skilful negotiation, lands in the now secularized Prince-Bishopric of Münster in Westphalia, where their line, as Princes at Salm-Horstmar, Waldgraves and Rhinegraves, still thrives today, if not as rulers. The time of being an independent country was over, not so, however, that of being an administrative centre. In 1798, the Canton of Grumbach was formed, which was grouped into the likewise newly formed Department of Sarre. In 1800, to form a level of government between these two, Arrondissements were formed, and the Canton of Grumbach was grouped into the Arrondissement of Birkenfeld. After the reconquest of the German lands on the Rhine’s left bank, the first authority that held sway here was the jointly Austrian- and Bavarian-led "Landesadministrationskommission" (“State Administration Commission”), whose seat was at Bad Kreuznach, before 1815, when the Congress of Vienna divided the Canton of Grumbach.