Calculation of the Price Difference on an Extension of Time

The calculation is made for the work items underlying the extensions of time given in the revised work programme, according to the published price difference principles for the nature of the work. In the calculation, the distribution of appropriations for the period before the extension of time may not be changed; the base index means the index for the month in which the completion date falls, and the current index the index for the month in which the work is to be carried out under the revised work programme.