 Its style and content reflected Henry I's Charter of Liberties, as well as a wider body of legal traditions, including the royal charters issued to towns, the operations of the Church and baronial courts and European charters such as the Statute of Pamiers.Under what historians later labelled "clause 61", or the "security clause", a council of 25 barons would be created to monitor and ensure John's future adherence to the charter.If John did not conform to the charter within 40 days of being notified of a transgression by the council, the 25 barons were empowered by clause 61 to seize John's castles and lands until, in their judgement, amends had been made.