(1) The expenditure entered in the budget shall be authorised for the duration of one accounting period unless the Financial Regulations provide otherwise.

(2) In accordance with the Financial Regulations, any appropriations, other than those relating to staff costs, which are unexpended at the end of the accounting period may be carried forward, but not beyond the end of the following accounting period.

(3) Appropriations shall be set out under different headings according to type and purpose of the expenditure, and subdivided, to the extent necessary, in accordance with the Financial Regulations.