Orders of the Day — Ways and Means. – in the House of Commons at on 12 May 1924.
9. "That for the purposes of any assessment to Income Tax for any year which is made on or after, or has not become final and conclusive before, the thirtieth day of April, nineteen hundred and twenty-four, or of any deduction on account of Income Tax for any year, any increase of or addition to any salary, remuneration, pension, annuity, or stipend by way of war bonus, and any other like temporary increase or addition granted in order to meet the rise in the cost of living, shall be, and shall be deemed always to have been, chargeable to tax as salary, remuneration, pension, annuity, or stipend, as the case may be, and not as perquisites.