I don’t think those pages will use the header and footer. At least not yet. That is a recent thing I added and I didn’t get to changing the rest of things yet. I guess it’s just a matter of me taking the time to change everything to use the new header and footer. I’ve just been so busy lately.
However, there is a header function inside includes/functions2.php which gets pulled into users/login_functions.php at line 47 to produce the full header. There are other pages which call the get_doc function around in the code somewhere I believe.