Under the WIDP Contract (Clause 19.2) the Authority has the right to ask the Contractor to open up the works during the construction period for inspection purposes. If this is the case the Authority is likely to have an obligation to minimise disruption and will be responsible for any costs arising unless the inspection shows the relevant part of the works are defective.
Where parts of the works are found to be defective the Contract Manager should consider whether the Authority should exercise its rights under Clause 19.5 to increase the level of monitoring of the works. The Contractor would have to pick up its own cost and that of the Authority.
If the Contractor and the Authority disagree about whether parts of the Works are defective then the matter will be determined in accordance with the Dispute Resolution Procedure.