Service bulletins get released by RA-Aus in consultation with the relevant parties such as CASA and / or FAA, then owners/operators are informed by the website and usually by snail mail. The severity of the service bulletin / AD determines whether or not it's a case of check before next flight, check within 50 hours or perhaps grounding as some examples.
As a side note a large number of RA-Aus LSA registered aircraft were recently grounded due to an LSA C of A paperwork issue that was identified by a recent CASA audit so it certainly can happen.
In this particular case if there have been similar occurrences I would expect to see an SB with a check before flight or within a certain number of hours. Or alternatively, nothing will happen.