The NRO NC election process a similar requirement.
<snip>Individuals who are on site and are registered for either the current APNIC Conference they are attending, or have been registered for at least one previous APNIC Conference since APNIC 10, are entitled to one vote.</snip>

Though it is not related to this proposal...... There is a pre-req for voters but there is no pre-req for nominees... :)
Best Wishes,

Aftab A. Siddiqui