Employer-Sponsored Visa
The employer-sponsored visa allows Australian employers to sponsor specific skilled labour to serve their business needs. It also allows skilled labour of a foreign country to explore their employment options with Australian employers, in case they may need their skills.

Both employers and employees must have a clear understanding of the employer visa laws and regulations to make a successful application. Even the slightest error in the application may result in negative visa outcome causing loss of time and money.
Both employees and employers must be aware of the visa conditions and obligations after the visa grant. In a way, it will help avoid any breach of visa conditions.
You can apply for this visa at the same time your employer lodges their applications to sponsor and nominate the position.
What Employer-Sponsored Visa allows you to do:
Work in Australia for up to four years
Bring your family to work or study in Australia
Travel in and out of Australia as often as you want
Since the purpose of this visa is to address the shortage of skilled labor that Australian employers may face in their business operations. The visa rules and requirements keep changing as per the need of Australian businesses.
Legislative instruments published on the comlaw website give you the following information:
The Consolidated Sponsored Occupation List which has the list of occupations that are eligible for visa application under Subclass 457/482.
English language tests, scores and exemptions: In this list, you can get the information regarding the tests and scores needed to demonstrate English language proficiency for subclass 457/482 applicants. It also lists out the occupations and salary levels where you are not expected to show your English language proficiency skills.
These instruments also list out basic requirements for the employers such as training benchmarks, market salary rates etc.