How mirroring actually works: a third party's CAD standard PDF is their copyright — being the owner of this registry app doesn't grant you redistribution rights. Goulburn Valley Water's own standard states it was adapted from South East Water's document with permission — that's the model to follow. Default every entry to Link only. Only mark Permission granted once you have it in writing, and only then add a hosted copy URL. What you can always redistribute freely: the factual data you extract from a standard (layer names, colours, numbering) — never the document itself.