The costs would be dependent on type of legislative mechanism is taken forward, whether that is by an emergency, fast-track, primary legislation or existing secondary powers.
Byddai'r costau'n dibynnu ar y math o fecanwaith deddfwriaethol a roddir ar waith, p'un ai drwy bwerau brys, carlam, deddfwriaeth sylfaenol neu is-ddeddfwriaeth bresennol.