This chapter considers the evolving institutional responses to the challenge of regulating telecoms in the EU, taking in the Commission’s push for creating an EU agency versus the resilience of the transnationally networked model, which is usually attributed to the Member States’ sovereignty reflex. Were recent negotiations over the reform of the Regulatory Framework for telecoms, concluded in 2009, simply a turf-war in which the Commission sought to extend the EU’s role against resistance from the Member States, or did the national telecoms regulators and their existing transnational network influence the eventual compromise to retain the soft law, networked model, albeit with some hardening? Characterised as a classic integration struggle, the Member States’ intergovernmental instincts were pitched against the Commission’s supranational instincts and its preference for instruments of control premised on the centralised exercise of hierarchical power. But this chapter paints a more fine-grained picture of the negotiation’s dynamics and especially the influence of the national regulatory authorities (NRAs) and their existing transnational network; a community of expertise that stood to have its role either strengthened or diminished in the revised institutional architecture. In doing so, the chapter moves beyond orthodox (intergovernmental and neofunctionalist) accounts of these dynamics to take an institutionalist approach that is better suited to analysing the EU as a mature system of governance.