The barons forced successive Kings to sign the Magna Carta until it became the law of the land. It became the first statute of the official statute book. Its provisions express the principle that a king is bound by the law and is not above it. However, there is no redress if the king breaches the law.
The Magna Carta was issued by John in 1215. A revised version was issued by Henry III in 1225 with the forest clauses separated out into a forest charter. The two versions are replicated together, with the formatting of each indicated in the titles below.
{Magna Carta - 1215}
Magna Carta - 1215 & 1225
MAGNA CARTA - 1225
{John, by the grace of God, King of England, Lord of Ireland, Duke of Normandy and Aquitaine, and Count of Anjou: To the Archbishops, Bishops, Abbots, Earls, Barons, Justiciaries, Foresters, Sheriffs, Reeves, Ministers, and all Bailiffs and others, his faithful subjects, Greeting. Know ye that in the presence of God, and for the health of our soul, and the souls of our ancestors and heirs, to the honor of God, and the exaltation of Holy Church, and amendment of our realm, by the advice of our reverend Fathers, Stephen, Archbishop of Canterbury, Primate of all England, and Cardinal of the Holy Roman Church; Henry, Archbishop of Dublin; William of London, Peter of Winchester, Jocelin of Bath and Glastonbury, Hugh of Lincoln, Walter of Worcester, William of Coventry, and Benedict of Rochester, Bishops; Master Pandulph, the pope's subdeacon and familiar; Brother Aymeric, Master of the Knights of the Temple in England; and the noble persons, William Marshall, Earl of Pembroke; William, Earl of Salisbury; William, Earl of Warren; William, Earl of Arundel; Alan de Galloway, Constable of Scotland; Warin Fitz-Gerald, Peter Fitz-Herbert, Hubert de Burgh, Seneshal of Poitou, Hugh de Neville, Matthew Fitz-Herbert, Thomas Basset, Alan Basset, Philip Daubeny, Robert de Roppelay, John Marshall, John Fitz-Hugh, and others, our liegemen:}
HENRY BY THE GRACE OF GOD, KING OF ENGLAND, LORD OF IRELAND, DUKE OF NORMANDY AND GUYAN AND EARL OF ANJOU, TO ALL ARCHBISHOPS, BISHOPS, ABBOTS, PRIORS, EARLS, BARONS, SHERIFFS, PROVOSTS, OFFICERS AND TO ALL BAILIFFS AND OTHER OUR FAITHFUL SUBJECTS WHICH SHALL SEE THIS PRESENT CHARTER, GREETING.
KNOW YE THAT WE, UNTO THE HONOR OF ALMIGHTY GOD, AND FOR THE SALVATION OF THE SOULS OF OUR PROGENITORS AND SUCCESSORS KINGS OF ENGLAND, TO THE ADVANCEMENT OF HOLY CHURCH AND AMENDMENT OF OUR REALM, OF OUR MERE AND FREE WILL, HAVE GIVEN AND GRANTED TO ALL ARCHBISHOPS, BISHOPS, ABBOTS, PRIORS, EARLS, BARONS, AND TO ALL FREE MEN OF THIS OUR REALM, THESE LIBERTIES FOLLOWING, TO BE KEPT IN OUR KINGDOM OF ENGLAND FOREVER.
[I. A CONFIRMATION OF LIBERTIES]
First, we have granted to God, and by this our present Charter confirmed, for us and our heirs forever, that the English Church shall be free and enjoy her whole rights and her liberties inviolable. {And that we will this so to be observed appears from the fact that we of our own free will, before the outbreak of the dissensions between us and our barons, granted, confirmed, and procured to be confirmed by Pope Innocent III the freedom of elections, which is considered most important and necessary to the English Church, which Charter we will both keep ourself and will it to be kept with good faith by our heirs forever.} We have also granted to all the free men of our realm, for us and our heirs forever, all the liberties underwritten, to have and to hold to them and their heirs of us and our heirs.
[II. THE RELIEF OF THE KING'S TENANT OF FULL AGE]
If any of our earls, barons, or others who hold of us in chief by knight's service dies, and at the time of his death his heir is of full age and owes to us a relief, he shall have his inheritance on payment of [no more than] the old relief; to wit, the heir or heirs of an earl, for an entire earldom, 100 pounds [2,000s.]; the heir or heirs of a baron of an entire barony, {100 pounds} 100 MARKS [67 POUNDS OR 1340s.]; the heir or heirs of an entire knight's fee, 100s. at the most [about 1/3 of a knight's annual income]; and he who owes less shall give less, according to the old custom of fees.