Temporary Work (Skilled) visa (subclass 457 visa) has been replaced with the completely new Temporary Skill Shortage (TSS) visa.
Temporary Skill Shortage (TSS) visa allows skilled workers to come to Australia and work for an approved business for up to:
four years after it is granted – if your occupation is listed on thehttp://www.border.gov.au/Trav/Work/Work/Skills-assessment-and-assessing-authorities/skilled-occupations-lists/mltssl
two years after it is granted – if your occupation is not listed on the MLTSSL.
You must be sponsored by an approved business. A business can sponsor someone for this visa if they cannot find an Australian citizen or permanent resident to do the skilled work.
This visa will allow you to apply for a permanent residency visa, Employer Nomination Scheme (subclass 186).