(2) Any such officer may, after _three years_ from the passing of this Act, retire from office, and shall, at any time during those three years, if required by the Irish Government, retire from office, and on any such retirement may be awarded by the Treasury a gratuity or pension in accordance with the Fifth Schedule to this Act: Provided that-- (_a_) Six months' written notice shall, unless it is otherwise agreed, be given either by the said officer or by the Irish Government, as the case requires; and (_b_) Such number of officers only shall retire at one time, and at such intervals of time as the Treasury, in communication with the Irish Government, sanction. (3) If any such officer does not so retire, the Treasury may award him, after the said three years, a pension in accordance with the Fifth Schedule to this Act, which shall become payable to him on his ultimate retirement from the service of the Crown. (4) The gratuities and pensions awarded in accordance with the Fifth Schedule to this Act shall be paid by the Treasury to the payees out of the Exchequer of the United Kingdom. (5) All sums paid out of the Exchequer of the United Kingdom in pursuance of this section shall be repaid to that Exchequer from the Irish Exchequer. (6) This section shall not apply to officers retained in the service of the Government of the United Kingdom. [Sidenote: As to existing pensions and superannuation allowances.] =29.= Any existing pension granted on account of service in Ireland as a judge of the Supreme Court or of any Court consolidated into that Court, or as a County Court judge, or in any other judicial position, or as an officer in the permanent Civil Service of the Crown other than in an office the holder of which is after the appointed day retained in the service of the Government of the United Kingdom, shall be charged on the Irish Consolidated Fund, and if and so far as not paid out of that fund, shall be paid out of the Exchequer of the United Kingdom. _Police._ [Sidenote: As to police.] =30.=--(1) The forces of the Royal Irish Constabulary and Dublin Metropolitan Police shall, when and as local police forces are from time to time established in Ireland in accordance with the Sixth Schedule to this Act, be gradually reduced and ultimately cease to exist as mentioned in that Schedule; and after the passing of this Act, no officer or man shall be appointed to either of these forces; Provided that until the expiration of _six_ years from the appointed day, nothing in this Act shall require the Lord-Lieutenant to cause either of the said forces to cease to exist, if as representing Her Majesty the Queen he considers it inexpedient.