This surety was to prevent the playing of unlawful games as well as for the maintenance of public order. Common selling of ale in booths at a fair by any person was permitted, however, "for the relief of the King's subjects that shall repair to the same", notwithstanding the rest of the Act.
This guarantee aimed to stop illegal games from being played and to ensure public order. While anyone could sell ale at a fair in booths, it was specifically allowed for the purpose of providing relief to those attending the fair.