For some occupations on the NSW subclass 190 Priority Occupation List now the NSW government introduced the additional requirements for the nomination. 

What is the requirement?

The additional requirement for these occupations are:

• be currently living in NSW
• have been employed in NSW for at least one year in your nominated occupation.

Source: https://www.industry.nsw.gov.au/live-and-work-in-nsw/visas-and-immigration/skilled-nominated-migration-190/frequently-asked-questions