In regulation 3 of the Principal Regulations—
(a) for the definition of "Ticonderoga Bay Sanctuary Zone", substitute —
' "Ticonderoga Bay Sanctuary Zone" means all the waters of Port Phillip Bay that are within 500 metres of the low water mark between a line drawn due north from Police Point and a line drawn due north from Nepean Rock at Point Nepean;';
(b) after the definition of "Ticonderoga Bay Sanctuary Zone" insert —
' "tour" means the activity that occurs between when a tour vessel leaves the jetty of departure and when it returns to that jetty;'.