The referendum question to be provided by the Citizens' Assembly
should be a multiple choice one in which the voters can select or
rank their preference for the ones they would want to use. The
method for counting the referundum votes should be established
beforehand and made public.
Also any new electoral system(s) proposed must pay attention to
the potential for electoral fraud since in all likelihood the next
election, if it is more complex than the current one, will be
counted using electronic voting machines.
"2004 Presidential election was offered for sale on E-bay. Asking
bid was $99,999,999.99." - 2003 August 18.
Reference: Chapter 9 of the online book "Black Box Voting" on:
http://www.blackboxvoting.org/
See also:
http://www.scoop.co.nz/mason/stories/HL0307/S00065.htm