Clergy Reserves were tracts of land in Upper Canada and Lower Canada reserved for the support of "Protestant clergy" by the Constitutional Act of 1791. One-seventh of all surveyed Crown lands were set aside, totalling 2,395,687 acres (9,695 km2) and 934,052 acres (3,780 km2) respectively for each Province, and provision was made to dedicate some of those reserved lands as glebe land in support of any parsonage or rectory that may be established by the Church of England. The provincial legislatures could vary or repeal these provisions, but royal assent could not be given prior to such passed bills having been laid before both houses of the British Parliament for at least thirty days.