All of this is slowly going in one direction.
ID cards.
'To assist citizens prove their age in scenarios such as buying cigarettes, ID cards will be mandatory from <insert date>. It will be a legal requirement to carry the card at all times, thus ensuring citizens can prove their age in scenarios where this is required.'
ID cards.
'To assist citizens prove their age in scenarios such as buying cigarettes, ID cards will be mandatory from <insert date>. It will be a legal requirement to carry the card at all times, thus ensuring citizens can prove their age in scenarios where this is required.'