From our 787 OMB:
”Maximum arrival fuel 20,000Kgs (See note 2)
Note 2: When planning tankering, consideration should be given to the formation of upper wing surface frost/ice in the vicinity of the fuel tanks. It has been determined that “warm” fuel uplifted at destination will normally have the effect of agitating the fuel in the wing tanks. This should melt ice/frost and prevent the formation of further ice during the turn round provided the maximum arrival fuel load is restricted. This figure is for guidance only. Higher arrival fuel may be planned provided consideration is given to the weather conditions at the destination airport.”