The main difference between Subclass 155 and Subclass 157 is the length of the travel facility – Subclass 155 offers a 5-year travel facility, while Subclass 157 offers a 3-month travel facility from the date of grant.
Features:
Length of the travel facility is up to 3 months from the date of grant
Stay in Australia indefinitely
Work and study in Australia
Undertake all the activities that your original permanent visa permitted you to take
Travel to and from Australia as many times until the travel validity expires
Enroll in Medicare
Sponsor eligible relatives for permanent residence
Eligibility:
If the individual lawfully spent a minimum of 1 day, and less than 2 years in the past 5 years in Australia immediately before applying for the visa
The individual had a compelling reason to leave the country
The individual was an Australian permanent resident or citizen the whole time they were present in Australia
Individuals who have been in the country for less than 2 years but have not established substantial ties to benefit Australia yet