Yes, i will be 21 soon.
That's excellent, because then you can order your replacement ID within 40 days after your birthday, and you'll get it without waiting too much.
That's sounds really great. Think i'll do just that. Say, this replacement thing is only for when it is expired or what?
No. You can go through this in the sorry case your Id get lost or even stolen, or in a softer case, when you change your address. But what out, because you can't do this if your ID is already expired. In that case, you must apply for a new ID.