PA066: STCP19-3 Clarification of Transmission System Boundary Point Registration with Elexon

Minor amendments to STCP19-3 to add clarification on the requirement to register with Elexon all new connections to the GB Transmission System as new Transmission System Boundary Points (TSBP).Clarity to be added on the roles of TO and NGET, the required notification period and connection types requiring registration.