3(1)The amount to be paid in any year by each respectively of the transport Boards shall be the relevant standard amount adjusted—
(a)by applying to that standard amount the fraction of which the numerator is the number determined under paragraph 2(1) of this Schedule and the denominator is 214; and
(b)by making such further adjustments for changes in the circumstances of the Board in question as may be prescribed by order made, subject to paragraph 6(2) of this Schedule, by the Minister.
(2)Any order made under sub-paragraph (1)(b) of this paragraph may provide for effecting a comparison between the circumstances of the transport Board in question and the circumstances at some time before 1st January 1963 of the British Transport Commission as a whole, or of the part of the Commission's undertaking corresponding to that of the Board, or partly the one and partly the other.