What does 'acting in a spirit of mutual trust and co-operation' (Clause 10.1) mean?

What does ‘acting in a spirit of mutual trust and co-operation’ (Clause 10.1) mean?

There are two facets to Clause 10.1: ‘The Employer, Contractor, Project Manager and Supervisor shall act as stated in this contract’ means do as the contract says i.e. raise and respond to communications within timescales etc; ‘act… in a spirit of mutual trust and co-operation’ means the parties should work openly and collaboratively with one another.