Jurisdiction over Crown property is divided between the provincial legislatures and the federal parliament, with the key provisions Sections 108, 109, and 117 of the Constitution Act, 1867. Public works are the property of the federal Crown, and natural resources are within the purview of the provinces. Title to such property is not vested in one jurisdiction or another, however, since the Canadian Crown is indivisible. Section 109 has been given a particularly-broad meaning; provincial legislation regulating labour used to harvest and the disposal of natural resources does not interfere with federal trade and commerce power, and royalties have been held to cover the law relating to escheats. Canada cannot unilaterally create Indian reserves, since the transfer of such lands requires federal and provincial approval by Order in Council (although discussion exists about whether this is sound jurisprudence).