141. (1). No Bill or amendment. which imposes or varies any tax or duty in which Provinces are interested, or which varies the meaning of the expression ” agricultural income” as defined for the purposes of the enactments relating to Indian income tax, or which affects the principles on which under any of the foregoing provisions of this chapter moneys are or maybe distributable to Provinces or States, or which imposes any such Federal surcharge as is mentioned in the foregoing provisions of this chapter, shall be introduced or moved in either Chamber of the Federal Legislature except with the previous sanction of the Governor-General in his discretion.
(2) The Governor-General shall not give his sanction to the introduction of any Bill or the moving of any amendment imposing in any year any such Federal surcharge as aforesaid unless he is satisfied that all practicable economies and all practicable measures for otherwise increasing the proceeds of Federal taxation or the portion thereof retainable by the Federation would not result in the balancing of Federal receipts and expenditure on revenue account in that year.
(3) In this section the expression ” tax or duty in which Provinces are interested means-
(a) a tax or duty the whole or part of the net proceeds whereof are assigned to any Province ;or
(b) a tax or duty by reference to the net proceeds whereof sums are for the time being payable out of the revenues of the Federation to any Provinces.