[Article 81] Federal Constitution 76 Obligations of States towards Federation 81. The executive authority of every State shall be so exercised— (a) as to ensure compliance with any federal law applying to that State; and (b) as not to impede or prejudice the exercise of the executive authority of the Federation. Chapter 3—Distribution of financial burdens Financing of expenditure relating to matters on Concurrent List 82. Where any law or executive action relating to any of the matters enumerated in the Concurrent List involves expenditure, such action shall be taken under this Constitution as will ensure that, unless otherwise agreed, the burden of that expenditure is borne— (a) by the Federation, if the expenditure results either from federal commitments or from State commitments undertaken in accordance with federal policy and with the specific approval of the Federal Government; (b) by the State or States concerned, if the expenditure results from State commitments undertaken by the State or States on its or their own authority. Chapter 4—Land Acquisition of land for federal purposes 83. (1) If the Federal Government is satisfied that land in a State, not being alienated land, is needed for federal purposes, that Government may, after consultation with the State Government, require the State Government, and it shall then be the duty of that Government, to cause to be made to the Federation, or to such public authority as the Federal Government may direct, such grant of the land as the Federal Government may direct: Provided that the Federal Government shall not require the grant of any land reserved for a State purpose unless it is satisfied that it is in the national interest so to do.