Isolation for close contacts ends in NSW at 6pm on Friday and in Victoria at 11.59pm.
Queensland will ease quarantine rules and scrap it entirely for unvaccinated international arrivals at 6pm on Thursday.
In the ACT, household contact quarantine rules will be ditched after Anzac Day and a similar move is being considered in South Australia.
Vaccination status and check-in requirements also continue to be wound back as Victoria eases rules for pubs, restaurants, theatres and sports venues.
Vaccine mandates for workers in multiple industries are being retained in Victoria, while NSW will shift to a risk assessment based mandate model.
NSW Premier Dominic Perrottet on Thursday said he had asked his ministry to conduct the risk assessments immediately.
The change to isolation requirements means people who are household contacts of a positive case will no longer need to isolate at home for seven days, so long as they continue to test negative.
They should still work from home where possible and avoid high-risk settings such as hospitals and aged care homes.
The Australian Health Protection Principal Committee had indicated it would be appropriate to drop some of the stricter restrictions once the current wave of infections had peaked.
However, authorities warn infection rates may spike as restrictions are eased.
Omicron cases are plateauing in NSW, with a steady decline in overall infections in young people, the latest surveillance report from state health authorities says.
The report for the week ending April 16 also showed unvaccinated NSW residents were still over-represented in hospital admissions.
Rural and regional NSW health districts were relying mostly on rapid antigen tests for diagnosing infections, with more about 80 per cent of infections caught by rapid tests in the far west, north coast and Murrumbidgee health districts.
Sydneysiders had better access to PCRs with a little more than 50 per cent using the tests to detect the virus.
Opposition Leader Anthony Albanese will continue his federal election campaign from isolation after testing positive to the virus on Thursday.
While West Australian Premier Mark McGowan confirmed on Friday that he had tested positive while in quarantine as a close contact of a family member.
LATEST 24-HOUR COVID-19 DATA FROM ACROSS AUSTRALIA:
NSW: 15,283 cases, 13 deaths, 1632 in hospital, 63 in ICU
Vic: 18,968 cases, 16 deaths, 428 in hospital, 30 in ICU
QLD: 8080 cases, 5 deaths, 528 in hospital, 18 in ICU
Tas: 1265 cases, 2 deaths, 41 in hospital, 1 in ICU
WA: 8777 cases, 5 deaths, 258 in hospital, 9 in ICU
SA: 4500 cases, 4 deaths, 246 in hospital, 10 in ICU
NT: 543 cases, 46 in hospital, one in ICU
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