Aside from the cap in the Contract Data, how can the Contractor’s liability for his design be limited?

NEC3 and NEC4 Contracts Secondary X, W and Y options
1

Aside from the cap in the Contract Data, how can the Contractor’s liability for his design be limited?

2

Design liability can also be limited to ‘reasonable skill and care’ by inclusion of Option X15. Without Option X15, the Contractor’s obligation is to design strictly in compliance with the Works Information.