I don't believe logging ICUS is as easy as you say it is.
Take a look at the guidelines
http://http://www.airservices.gov.au...ps/logbook.pdf
The operator must permit that person to fly the aircraft acting as ICUS.
CAR 5.40 Pilot acting in command under supervision
(1) A person may fly an aircraft as pilot acting in command under
supervision only if:
(a) the person holds:
(i) a commercial pilot licence or an air transport pilot licence;
or
(i) a certificate of validation that has effect as if it were a
commercial pilot licence or an air transport pilot licence;
and
(b) the person holds an aircraft endorsement that authorises him or
her to fly the aircraft as pilot in command; and
(c) if the person proposes to carry out an activity for which a flight
crew rating is required—the person holds a flight crew rating, or
grade of flight crew rating, that permits him or her to carry out
that activity as pilot in command of the aircraft concerned; and
(d) the person is the co-pilot of the aircraft; and
(e) the operator of the aircraft permits the person to fly the aircraft as
pilot acting in command under supervision; and
(f) the pilot in command of the aircraft is appointed for the purpose
by the operator of the aircraft.
Penalty: 10 penalty units.
(2) The operator of an aircraft may permit a person to fly an aircraft as
pilot acting in command only if:
(a) the person holds:
(i) a commercial pilot licence, or an air transport pilot licence,
that authorises him or her to fly the aircraft; or
(ii) a certificate of validation that has effect as if it were such a
licence; and
(b) the person holds an endorsement that authorises him or her to fly
the aircraft as pilot in command; and
(c) if the person carries out an activity for which a flight crew rating
is required—the person holds a flight crew rating, or grade of
flight crew rating, that permits him or her to carry out that
activity as pilot in command of the aircraft concerned.