I guess like all airlaw questions it comes down to the exact wording..
You Should be providing reporting points up to 30mins/200nm.
It could be interpreted if you dont and all goes well CASA/ASA doesn't care.
If however it goes wrong and 30mins is wasted before the alarm is raised because your sarwatch is on a 50 min reporting time from not following the recommendation of the AIP they will probably try to charge you with negligence or something.