05/09/2017 · Guide for Safety with Underground Services (PDF 349 KB) [PDF, 349 KB] WorkSafe New Zealand. Health and Safety at Opencast Mines, Alluvial Mines and Quarries (PDF 12 ) [PDF, 12 ] WorkSafe New Zealand. National Code of Practice for Utility Operators' Access to Transport Corridors New Zealand Utilities Advisory Group (NZUAG) ...