There are also issues where authorities currently charge for concessionary or post 16 seats on buses and the loss of income to the authorities if this becomes free.
Hefyd ceir materion lle mae awdurdodau yn codi tâl am seddi consesiynol neu ôl-16 ar fysiau a'r incwm y bydd yr awdurdodau yn ei golli os bydd hyn am ddim.