How exactly would a Triple Zero custodian help prevent a repeat of the fatal Optus outage?

In the wake of last week’s Optus network outage that left multiple people dead after they were unable to call Triple Zero for help, there has been much discussion about the need for a Triple Zero custodian in Australia.

But what exactly would this custodian do? And how might it help prevent a similar tragedy from occurring in the future?

A ‘priority recommendation’