Sorry, ajjack (and all)
My mistake
I quoted a rule from 2005.
Apparently, that rule no longer applies. Otherwise, the ATO would've mentioned it in their documentation for last year's tax returns:
http://www.ato.gov.au/content/downloads/IND00191833n41050609.pdf
Now you know why I pay a CPA to do all my tax returns
Further to my earlier comments about
calculating franking credits:
The following spreadsheet has been updated to automatically calculate divi components, including tax.
To download an example:
DiviDataWImputation.xlsx
However, since the raw data is pulled off the ASX website, hence there's no guarantee the raw data is correct, I always use the individual company's dividend advice to put into my portfolio database.