It all depends! there are many types of statutory declaration you need. For example: If you do not have a particular piece of ID then you need to take what you have and go to a notary public. If you are trying to prove you are a not married than you will also need to show documents to a notary public and they can sign for you. Well just try to explain what type of declaration you need and phone any notary public office and ask them if they provide it there or if they know where you can get it. I once paid $25 to a notary public to sign a form that I needed to get my pass port.

Good luck