Ok, thank you JandM.
So, for example, I'm wanting to use the 234313 ENVIRONMENTAL RESEARCH SCIENTIST, and my job offer description and duties does match the sub-heading 'Studies and develops policies and plans for the control of factors which may produce pollution, imbalance in or degradation of the environment.', but I'm unable to match a substantial amount of the 'tasks include' at the top of the Unit Group.
When defining skilled employment, INZ state that "...offer of employment or current employment substantially matches the description for that occupation (including core tasks) as set out in the Australian and New Zealand Standard Classification of Occupations (ANZSCO)...". So, which are the core tasks? Are these the 'tasks include' bullet points? Or the occupation sub-heading? And if the 'tasks include' bullet points are the core tasks that I need to substantially match, I'm assuming I would need a majority? But as you said, how can one person do all those jobs under that general umbrella?!
Thank you very much for your help.