implementation of the FWC. It must also take out supplementary insurance as reasonably required  by standard practice in the industry. Upon request, the contractor must provide evidence of  insurance coverage to the contracting authority.  II.6.3 The contractor is liable for any loss or damage caused to the contracting authority during or as a  consequence of implementation of the FWC, including in the event of subcontracting, but only to an  amount not exceeding three times the total amount of the relevant specific contract. However, if the  damage or loss is caused by the gross negligence or wilful misconduct of the contractor or of its  personnel or subcontractors, the contractor is liable for the whole amount of the loss or damage.  II.6.4 If a third party brings any action against the contracting authority in connection with the  implementation of the FWC, the contractor must assist the contracting authority in the legal  proceedings, including by intervening in support of the contracting authority upon request.  II.6.5 If the contractor is composed of two or more economic operators (i.e. who submitted a joint tender),  they are all jointly and severally liable to the contracting authority for the implementation of the FWC.  II.6.6 The contracting authority is not liable for any loss or damage caused to the contractor during or as a  consequence of implementation of the FWC, unless the loss or damage was caused directly by wilful  misconduct or gross negligence of the contracting authority.  If the contracting authority’s liability towards the third party is established and such liability is caused  by the contractor during or as a consequence of the implementation of the FWC, Article II.6.3  applies.  II.7. PROFESSIONAL CONFLICTING INTERESTS  II.7.1 The contractor must take all necessary measures to prevent any situation of professional conflicting  interest.  II.7.2 The contractor must notify the contracting authority in writing as soon as possible of any situation  that could constitute a professional conflicting interest during the implementation of the FWC. The  contractor must immediately take action to rectify the situation. The contracting authority may do any of the following:  (a) verify that the contractor’s action is appropriate; (b) require the contractor to take further action within a specified deadline; (c) decide not to award a specific contract to the contractor. II.7.3 The contractor must pass on all the relevant obligations in writing to:  (a) its personnel;  (b) any natural person with the power to represent it or take decisions on its behalf;  (c) third parties involved in the implementation of the FWC, including subcontractors.  The contractor must also ensure that the persons referred to above are not placed in a situation  which could give rise to professional conflicts of interest. 20 