What should the Parties do if the Adjudicator does not respond to a notice of adjudication within three days?

What should the Parties do if the Adjudicator does not respond to a notice of adjudication within three days?

If the Adjudicator does not so notify within three days of the issue of the notice of adjudication, either Party may act as if he has resigned (see Clause W2.3(1)).