No, firecracker. For the NSW premium style plates, ie ABC-99A, neither the letter "O" or the letter "I" is allowed to be used for the last character in order to avoid confusion with numbers 0 and 1.
In actual fact, a few years back the RTA were making plates that had both the letter "I" and the number "1" looking exactly alike, ie a vertical line without the top and bottom identifiers. This caused alot of incorrectly issued fines and they subsequently changed the plates to make the two read correctly. They also adopted the policy which no longer allowed the same plates where the numbers 0 and 1 could be used in place of the letters "O" and "I" to create a similar looking plate. For example, "NXT1ME" could not be used if "NXTIME" was already taken.