It's not as simple as that.
in order to use the license legally you need to comply with it. If you're challenged, which it sounds like you might be, you're going to save yourself a lot of grief by being able to point to a copy of the licence and explain that you know the legal framework within which you're using it.
I know of no reason why you can't use it in your own garden, provided that you own it. If it's rented it might be a different matter.
The file is a PDF File, you can download a free reader from here http://get.adobe.com/uk/reader/
Just as a bit of background,