This is a really well thought out poem. (Now this next bit is MHO only, tell me to 'go jump' if you like) As this is an older piece of work, I'm sure that if you examine it closley, you'll see what I see. You know enough to polish this poem up and get the metre spot on. It only needs just a little brush up to go from good to great. I have not looked really closley but I did spot one singular/plural rhyme, and a spot where you could simply drop a word or two to realighn the metre and not lose the meaning. In any case I like it. Thanks for sharing it with us.
A fitting Australia Day poem.