HalWhitewyrm said:The section 15 thing, at least, has been made pretty clear in the past on various industry forums, and confirmed by both Ryan Dancey and Anthony Valterra when they had a say in it (unfortunately I cannot find links to show their words).
Namely, when you use OGC from a book, you transcribe faithfully that book's section 15, regardless of content or size. The only thing you are allowed to do is remove duplicate entries (and I think no one will complain if typos are fixed as well). Frankly, I find it a little bit annoying when I see products that haven't got this right after 5 years of dealing with the OGL.
I was wondering about this the other day for a thing I'm working on, and it took less than 10 minutes of poking around to find out the answer to this. Once you understand that the term COPYRIGHT NOTICE in section 6 of the OGL refers to all of section 15, it's pretty self-explanatory, too.