They can always crucify you with 91.13 "reckless and careless operation of an aircraft" hence follow the aim:
if not para c. of 91.3 "responsibility and authority of the PIC"
91.103 "preflight action"---the one about obtaining ALL available info concerning your flight...especially in combination with one of the above
And examiners can [ and probably will] fail you for using non-standard holding pattern entries and made up course reversals---- not the law either but you must do it, basically.
However, the Aim is good advice anyway so whats the big deal, why not follow the recomendations therein---
Sorry for the thread creep
There is always a way for governments to destroy aviators.