Quick glance, this guide looks more like a "morality" guide than a "legal" guide. What one should/should not do versus what can/can't be done.
@FurryGuy: what do you think the word "guidelines" means??
@LB,
I have seen the term used, by supposed experts in their field, to mean either a "should do" or "can do" guide. Hence my comment.
CppCon 2015: Bjarne Stroustrup opening Keynote “Writing Good C++14” (announced the C++ Core Guidelines)
https://www.youtube.com/watch?v=1OEu9C51K2A