Most OB's, including the ANZAC one, were designed a long time ago. They have been continually updated and revised were needed, and were new information surfaced. And will likely continue to be updated so your information is welcome.
What do you make of this website and the info with regards to the Australian and New Zealand Ob's therein:
http://www.orbat.com/site/ww2/drleo/...itain/__uk.htm