With regard to administration, Leisel belonged to the Pflege (literally “care”, but actually a local geopolitical unit) of Brombach.

The Amt administrators had their seat at Birkenfeld Castle, while the municipalities themselves were each led by a Reihe-Bürgermeister (Reihe means “row” or “series” in German), who changed every year.

It comprised the villages of Siesbach, Leisel, Schwollen, Hattgenstein, Rinzenberg, Hambach, Böschweiler and Heupweiler.

Grand Duke Peter had it built so that he did not have to travel through the Kingdom of Prussia, with whom he had ongoing border disputes, whenever he visited the Birkenfelder Land.

Oldenburg still existed as a state even through Imperial and Weimar times, but Nazi Germany finally put an end to it in 1937 on the basis of the Greater Hamburg Act; the Birkenfeld exclave, along with Leisel, as it was now called, was incorporated into Prussia's Rhine Province.

The countercompony base (that is, with two rows of squares of alternating tinctures) is a reference to the village's former allegiance to the “Hinder” County of Sponheim, Oberamt of Birkenfeld.

[5] The following are listed buildings or sites in Rhineland-Palatinate’s Directory of Cultural Monuments:[6] To the northeast runs Bundesstraße 422.