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Can't say authoritatively as I'm not familiar with NZ rules but in the US, IFR charts are published every 28 days, thus any chart older than that would be 'Not for navigation'. This one was effective 9 Nov 17. Also, redaining the NZ AIP web site disclaimer, the charts are for 'personal use'. This approach is restricted in that it requires GE Aviation approval as well as CANNZ RNP-AR approval. Basically, this is a PBN RNAV approach for airliners with a GE Aviation FMS. So there's no real reason to keep a valid copy on the web site since most of the public can't use it. understanding pbn and rnav