You will require this registration if you intend to operate a cathodic protection system. Cathodic protection systems are complex and you need a consultant or fully trained person in the installation, operation and testing of these systems.
Cathodic protection systems are often used with structures like building reinforcement, buried metallic pipeline and cables. Cathodic protection devices protect structures and metalwork from corrosion. They put the metal to be protected by a cathode element in an electric current which encourages corrosion in a less critical or cheaper, anode material.
All cathodic protection systems capable of delivering a current greater of 0.25A must be registered.