The Australian Defence folk are a little further along the road than the civil.
Following several tragic events, the relevant Regulatory Authority (DGTA) has directed much effort to the maintainer limitations aspect of operations support.
You might like to have a look at the
DGTA website (click on AMIP) and, perhaps, even give Scott Lockey a call at DGTA (Laverton - RAAF Williams) to get some target references ...