One long international flight I did across many FIRs, the FIR NOTAMs only were 133 pages in normal font. And there was some important stuff buried on page 80 that would have caused significant angst if I hadn't found it. I was glad I'd spent the 2 hours the day before poolside checking them.
NOTAM requirements are here
https://www.airservicesaustralia.com...s-for-CASA.pdf