Further members included Herbert Fritz, and a number of "South Tyrol activists" (Befreiungsausschuss Südtirol).
Burger ran in the 1980 presidential election "for a German Austria", gaining 140,741 votes (3.2%).
Two years later he and Gerd Honsik initiated a petition for a referendum "against superalienation", which however was not achieved.
On 25 June 1988 the NDP was banned by a verdict of the Constitutional Court of Austria on the basis of the Verbotsgesetz 1947 and Article 9 of the Austrian State Treaty (Disbandment of Nazi Organisations), revoking its legal capacity as a political party.
In its explanatory statement the court determined that the NDP's "key principles and demands" are based on "biological-racist ideology ("Volksbegriff")" and also that its "pan-German Propaganda" is in agreement with the main goals of the Nazi Party.