Australia and the Design-a-weapon Contest
Australia would probably make swords where you hold the blade and arrows that shoot bows, its always so upside down.
Almost certainly you won’t be able to. ANet can’t let you waive participation for the same reason that you couldn’t participate in the first place
Australia (and Quebec) have rules in place that are theoretically designed to protect participants from scams. Those end up causing a lot of promoters to skip offering contests, because it increases the cost of the contests, without generating a comparable amount of publicity (or participation). In other words, it’s just easier for legit companies to stick to places that offer only basic protections. On the other hand, it’s also easier to prosecute scammers in those locales so that’s good for the grandmas etc.
tl;dr no, there’s probably no way for your design to be considered unless you’re a participant.
Why not just hand over your design to a friend from the UK or NA or wherever along with all rights and credit? If they are your friend and they win, they likely will credit you via word of mouth. Or is that against the rules?