11.—­(1) The hereditary revenues of the Crown in Ireland which are managed by the Commissioners of Woods shall continue during the life of Her present Majesty to be managed and collected by those Commissioners, and the net amount payable by them to the Exchequer on account of those revenues, after deducting all expenses (but including an allowance for interest on such proceeds of the sale of those revenues as have not been re-invested in Ireland), shall be paid into the Treasury Account (Ireland) hereinafter mentioned, for the benefit of the Irish Exchequer. (2) A person shall not be required to pay income tax in Great Britain in respect of property situate or business carried on in Ireland, and a person shall not be required to pay income tax in Ireland in respect of property situate or business carried on in Great Britain. (3) For the purpose of giving to Ireland the benefit of the difference between the income tax collected in Great Britain from British, Colonial, and foreign securities held by residents in Ireland, and the income tax collected in Ireland from Irish securities held by residents in Great Britain, there shall be made to Ireland out of the income tax collected in Great Britain, an allowance of such amount as may be from time to time determined by the Treasury, in accordance with a minute of the Treasury laid before Parliament before the appointed day, and such allowance shall be paid into the Treasury Account (Ireland) for the benefit of the Irish Exchequer. (4) Provided that the provisions of this section with respect to income tax shall not apply to any excess of the rate of income tax in Great Britain above the rate in Ireland or of the rate of income tax in Ireland above the rate in Great Britain.

12.—­(1) The duties of customs contributed by Ireland and, save as provided by this Act, that portion of any public revenue of the United Kingdom to which Ireland may claim to be entitled, whether specified in the Third Schedule to this Act or not, shall be carried to the Consolidated Fund of the United Kingdom, as the contribution of Ireland to Imperial liabilities and expenditure as defined in that Schedule. (2) The civil charges of the Government in Ireland shall, subject as in this Act mentioned, be borne after the appointed day by Ireland. (3) After fifteen years from the passing of this Act the arrangements made by this Act for the contribution of Ireland to Imperial liabilities and expenditure, and otherwise for the financial relations between the United Kingdom and Ireland, may be revised in pursuance of an address to Her Majesty from the House of Commons, or from the Irish Legislative Assembly.