“…1, TEU). Since the entry into force of the Maastricht Treaty, specific kinds of interparliamentary cooperation have been a widely discussed topic in political science and practice (Benz, 2011;Crum & Fossum, 2009;Eppler, 2011Eppler, , 2015Fossum & Crum, 2012Maurer, 1996Maurer, , 2002Maurer, , 2009Maurer, , 2012. In particular, the introduction of rights for national parliaments to control legislative proposals of the EU Commission against the principles of subsidiarity and proportionality, and the dependency of parliamentary possibilities to obstruct and sanction the Commission's activity on participation quota, have been identified as catalysts that facilitate interparliamentary cooperation (Benz, 2011;Eppler, 2011).…”