NEC ECC: Project Manager issuing a termination certificate?

What is the procedure for this termination and what is the role of Client, Contractor and Project Manager in this?

Who determines the payment on termination and how is this done?

Read section 9 of the contract and if you have any specific queries, get back to us.

The Project Manager issues a termination certificate later that day.
What is the procedure for this termination and what is the role of Client, Contractor and Project Manager in this?
Who determines the payment on termination and how is this done?