I Think You will Find That there Is A 12 Month Time limit from the time The race is Resulted. But there could be different rules from state to state. Best give your Local TAB a visit to be sure.
Starman I think u may have SMALL Problem like the rest of US ..
Way To Go Chilli , Your 10 year old will still BEAT 80% of the things ive Backed over the years.. Hope All Goes well for you..