You can only do the FI course and then the restriction removal to be able to do it.
But seriously I do wonder why anyone bothers. It means you have to fanny around late at night. The risk factor goes through the roof and thats from a instructing point of view never mind the additional risk of flying at night in a SEP. And you don't get payed any extra for it.
If I did everything again I wouldn't have got the restriction removed.