Which one statement regarding the adjustment of the Contract Price as mentioned in Sub-Clause 13.

If the Contract Price is to be adjusted for rises and falls in the cost of labour, the Contractor is entitled to compensation in such a way that all rises and falls in the costs are compensated fully.

The Particular Conditions can provide a calculation method or refer to a specific set of index for adjustments following Sub-Clause 13.8. This can result in lower adjustments of the Contract Price than the actual changes in the costs of labour and/or Goods.

If Particular Conditions provide a calculation method or refer to a specific set of index for adjustments following Sub-Clause 13.8, it can only apply to rises or falls in the costs of labour and Goods.

The Particular Conditions can provide a calculation method or refer to a specific set of index for adjustments following Sub-Clause 13.8. Only the Base Date can be taken as the date from which the adjustment should be calculated from.