Laws to abolish good character as a mitigating factor in all criminal proceedings will be introduced by the NSW government next week.
Most states and territories have carve-outs preventing many child sex offenders relying on "good character" to lessen sentences.
But should the laws pass when introduced on Wednesday, NSW will be the first state to scrap the test completely in a massive overhaul of the criminal justice system.
The announcement comes off the back of recommendations released on Sunday from the NSW Sentencing Council and the tireless work of victim advocates.
"This is one of the most substantial reforms in NSW courts since no-fault divorce in 1976," Harrison James, co-founder of Your Reference Ain't Relevant, told AAP.
"This reform shifts courts from privileging offenders' social standing to centring the lived experience and trauma of survivors."
A survivor of child sexual abuse, Mr James and his co-founder Jarad Grice have been on a three-year mission to have 'good character' mitigation abolished across the nation.
"I hope this shows every survivor and victim of crime that their voice matters and that they can demand justice," Mr James said.
Other mitigating factors, including a lack of previous convictions and the prospect of rehabilitation, will still be considered in sentencing decisions.
The 2017 child sex abuse royal commission prompted most states to wind back protections for people who used their 'good character' to commit their crimes.
But no other jurisdiction has widened the removal of good character beyond the realm of sexual offending.
The state attorney-general says the new sentencing guidelines will help prevent unnecessary trauma in courtrooms.
"Victim-survivors shouldn't have to sit in court and hear the person who hurt them or their loved one described as a 'good person'," Michael Daley said.
Using character in sentencing may contribute to social disadvantage because certain groups are more likely to benefit than others, the Sentencing Council report says.
Wealthy and influential criminals have much greater access to positive character references while those with intellectual disability are often frozen out.Â
With NSW being the first to move on a blanket abolition, Mr James says other states and territories have been watching the legal developments in earnest.
"These crimes don't discriminate by state borders," he said.
"We'll fight tooth and nail to ensure that this gets to every corner of the nation."
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