Specific sectors, such as health, energy, transport, digital infrastructure, and water are subject to the Network and Information Systems (NIS) Regulations.
Mae sectorau penodol, fel iechyd, ynni, trafnidiaeth, seilwaith digidol a dŵr yn ddarostyngedig i Reoliadau Rhwydweithiau a Systemau Gwybodaeth (NIS).