416. Adjudicator's decision.

The adjudicator must decide the matters in dispute1. He may take into account any other matters which the parties to the dispute agree should be within the scope of the adjudication or which are matters under the contract which he considers are necessarily connected with the dispute2. In particular, he may:


    (1)     open up, revise and review any decision taken or any certificate given by any person referred to in the contract unless the contract states that the decision or certificate is final and conclusive3;


    (2)     decide that any of the parties to the dispute is liable to make