I had a copy of the document on my old computer (somebody had uploaded it onto a shell site), but I don't have that computer any more nor do I have the link...
The whole doc is up there somewhere...
Also, some LCCs do interline, just not in India. For example, JetBlue has been signing interline agreements at a very rapid pace. Not only interlines actually, but also codeshares. If some Indian LCC decided that it is worth the additional cost to be able to feed foreign carriers, then they might sign interlines. IATA membership is unlikely for an LCC of course.