I'm not sure about a police check and I can't remember what's in the declaration now. Yes, there's training whether you've got experience or not, usually about 2-3 hours to issue ordinary votes, and another couple if you're taking specials (people out of their electorate, people who've moved etc), plus more again if you're a voting place manager. I've done ordinary and special votes, but being a manager is quite involved with all the paperwork at the end of the day; I wouldn't do it. I offered to do advance votes but they had enough people here already, with only one place taking them, and the post-election check and recount is in Alexandra which is ridiculously far away (this is the largest electorate geographically in the country, I think). But if you have a compact electorate, you could go for any of those next time.