Hi, I don't know if there is a previous post regarding obtaining police clearance. However, is it possiblt to ask or get from INZ the letter od authority even if you're not done with your EOI the idea is to at least prepare those documents since the timeframe is not sure on how long you can ontain the clearance from the country that you live for 1yr above. As I know and correct me if I'm wrong, that once you have the ITA you need to submit all the documents within 4 mos after you receive your ITA.
Thanks