This second analytical chapter of the book presents the results of the QCAs analysing the conditions under which traditional party demands have started to demand legislative autonomy and under which these demands evolved. The findings show that traditional party demands come either up in the presence of a regionalist threat in sub-state communities with strong sociological distinctiveness and political, or when the demands from other communities spilled over to cases with some (or even stronger) forms of socio-economic distinctiveness and grievances. In the latter case, a large group size or concrete prospects of autonomy appear sufficient compensations for weaker degrees of distinctiveness or grievances. The increase of traditional parties’ demands for legislative autonomy, in turn, are shown to occur under similar conditions. As for the decrease of traditional parties’ demands for legislative autonomy, it appears there was no such instance in the cases and periods under study. The disappearing of autonomy demands among traditional parties, finally, is shown to have only occurred in cases of democratic breakdown.