Under the FIDIC Red Book (edition 2017), if the Contractor fails to comply with Site...

The Employer may sell or otherwise dispose any remaining items and reinstate the Site at the Contractor's Cost.

The Engineer cannot sell or otherwise dispose any remaining items and reinstate the Site at the Contractor's Cost.

The Employer is entitled to the cost of reinstating, clearing the Site and disposal cost to the extent they exceed the money received from selling the remaining Contractor's items on the Site.

The Employer cannot reinstate and clear the Site and dispose the remaining Contractor's items on the Site if the Contractor fails, as this is the Contractor's obligation.