When I have cruised on Carnival from Australia in the past, the first thing I did if I wanted to do a Carnival shore excursion, was go straight to the excursion desk after boarding. Like you, I was unable to pre book before the cruise.
The legislation was passed into law on the 26 Oct 22 and assented on the 28th. The changes come into effect on Friday the 4th November. Good luck Uncle Les when you apply for your CSHC card.🤞🙏