The Australian and New Zealand Standard Classification of Occupations (ANZSCO) is a skill-based classification system used to classify all occupations and jobs available in the Australian and New Zealand labour markets.
Yes, its necessary to match and mention the ANZSCO code, If the assessor finds that your application is unsuitable under the nominated occupation, a suitable ANZSCO may be suggested IF there is a clear alternative.
If the recommendation is accepted it does incur an additional fee of $200.