Give or take details of any blogs or personal websites or use any form of electronic communication to send messages to a passenger that do not relate to matters around the hiring of the vehicle.
Rhoi na chymryd manylion unrhyw flogiau na gwefannau personol na defnyddio unrhyw fath o ddull cyfathrebu electronig i anfon negeseuon at deithiwr nad ydynt yn ymwneud â hurio'r cerbyd.