This chapter examines the use of the ad hoc approach to energy governance in the context of the exploitation of certain resources, hydroelectricity and offshore wind power, and then in that relating to fixed transmission infrastructures, pipelines and electricity transmission lines. The increasing variety of applications of the ad hoc approach, particularly to modern renewable energies and electrification, can be seen as a manifestation of the ongoing energy transition. From the analytical perspective used in this book, such applications illustrate the ad hoc legal organisation of new transactions, enabled by the energy transition.