Starting with the controversial medevac law, or, the medical evacuation law that was passed in February.
The law gives doctors more power to decide whether asylum seekers and sick refugees at Manus Island detention centers and Nauru should be taken to Australia for medical treatment.
Prime Minister Scott Morrison said laws that contradicted the government's wishes would weaken border security and encourage more people to try to come to Australia by boat.
The law has now been revoked in December after being unanimously approved in a vote.
Other new immigration laws during 2019 are to encourage more migrants to settle in the regional area, to increase growth in cities and with hopes of reducing congestion in big cities.
Two new skilled visas were offered, which required skilled migrants to live and work regionally for three years before gaining access to permanent housing.
This includes skilled regional visas sponsored by employers, as well as regionally skilled temporary work visas, which are for people nominated by state or territory governments or sponsored by family members who are eligible to live and work in regional Australia.
Every city in Australia - except Sydney, Melbourne and Brisbane - is now classified as "regional" for the purpose of the visa.
The number of migrants granted permanent residency this year has fallen to the lowest level in a decade.
Around 160,000 visas were granted under the permanent migration program in 2018-19 - that's nearly 30,000 fewer than the annual migration limit of 190,000.
The government now limits permanent migration to 160,000 over the next four years.
Australia's population, now around 25.5 million people, is expected to increase to 40 million by 2049.
