Paragraph 3
For the purpose of determining the amount of relevant receipts and assumed interest receipts or the amounts from time to time required for the purposes mentioned in paragraph 2 above, such assumptions shall be followed by the Secretary of State as to—
the manner in which those receipts are to be treated as applied for those purposes,
the times at which payments would be made in respect of expenditure, interest and other amounts referred to in any sub-paragraph of that paragraph, and
the amounts of such payments,
as the Treasury may direct; and such a direction may require different assumptions to be followed in relation to different times and in relation to, or to interest on, different expenditure or other amounts referred to in any sub-paragraph of that paragraph.