In effect the Charter was a treaty between the king and his dissatisfied subjects. It was essentially a feudal document, and the majority of its provisions relate primarily to the privileges and rights of the barons. None the less, it contains clauses that affected all classes of society, and it is especially noteworthy that the barons and clergy pledged themselves in it to extend to their dependents the same customs and liberties which they were themselves demanding of the crown. Taking the Charter as a whole, it guaranteed the freedom of the Church, defined afresh and in precise terms surviving feudal (p. 010) incidents and customs, placed safeguards about the liberties of the boroughs, pledged security of property and of trade, and stipulated important regulations respecting government and law, notably that whenever the king should propose the assessment of scutages or of unusual aids he should take the advice of the General Council, composed of the tenants-in-chief summoned individually in the case of the greater ones and through the sheriffs in the case of those of lesser importance. Certain general clauses, e.g., that pledging that justice should neither be bought nor sold, and that prescribing that a freeman might not be imprisoned, outlawed, or dispossessed of his property save by the judgment of his peers or by the law of the land, meant in effect considerably less than they sometimes have been interpreted to mean.[11] Yet even they served to emphasize the fundamental principle upon which the political and legal structure was intended to be grounded, that, namely, of impartial and unvarying justice.[12] [Footnote 11: The term "peers," as here employed, means only equals in rank. The clause cited does not imply trial by jury. It comprises a guarantee simply that the barons should not be judged by persons whose feudal rank was inferior to their own. Jury trial was increasingly common in the thirteenth century, but it was not guaranteed in the Great Charter.]