Section 27

The parties to adjudication may at any time by agreement in writing extend the jurisdiction of the adjudicator to decide on any other matter not referred to the adjudicator pursuant to sections 5 and 6.

Construction Industry Payment and Adjudication 21

Notwithstanding a jurisdictional challenge, the adjudicator may in his discretion proceed and complete the adjudication proceedings without prejudice to the rights of any party to apply to set aside the adjudication decision under section 15 or to oppose the application to enforce the adjudication decision under subsection 28(1).