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A came into effect in the ACT at the weekend decriminalising personal possession of common illegal drugs.

The bill decriminalises the possession of , including cocaine, methamphetamine, MDMA, LSD, psilocybin (magic mushrooms) and heroin for personal use.

Critics of the move say when similar laws were brought into effect in the US state of Oregon, overdose deaths went up. However, there was already an upward trend, and Oregon now has lower rates of death from overdose than most other US states.

Remind me again, what does decriminalisation mean?

Decriminalisation isn’t legalisation. With decriminalisation, , but the criminal penalties are removed. Instead, they usually attract a fine, a bit like a speeding fine.

The ACT will be the first Australian jurisdiction to decriminalise common illegal drugs. In this model, people will be diverted from police to where a health worker assesses their wellbeing and the need for support or intervention. They provide education and harm-reduction information and make referrals to other services if needed.

Police will still confiscate illicit drugs they find on people. Drug dealing and trafficking are still criminal offences.

This system means people who are caught with small amounts of some drugs will be diverted away from the criminal justice system. Contact with the criminal justice system is one of the from illicit drugs.

There’s no evidence enforcement-led solutions to personal drug use reduce use or harms. But having a criminal record can have a long-term impact on getting a job or secure housing, which can then increase the likelihood of further drug use. Current punishments in many states and territories include a possible prison sentence.

Policing of drug laws, and the justice system itself, disproportionately impacts Aboriginal people and other people of colour. Young people have been described as being traumatised and dehumanised by the use of by police.

The change is supported by and backed by major health and human rights organisations, such as the , and the .

Where else has decriminalised drugs?

We know from other jurisdictions that decriminalisation reduces harms from drugs and increases seeking help. is the most well-known case. It decriminalised all drugs more than 20 years ago and has seen significant reductions in drug deaths, crime and drug use.

But critics in Australia are concerned about the possible negative outcomes, pointing to problems in Oregon. The federal opposition unsuccessfully introduced a bill to .

In November 2020, Oregon passed , which decriminalised the possession of small amounts of drugs for personal use. Instead of criminal charges, people are now given a US$100 (A$155) fine for possession, which is waived if they contact a support hotline.

After Portugal decriminalised personal drug use in 2001, there was a .

In the two years after Measure 110 passed, opioid overdose deaths in Oregon .

Why did this happen in Oregon?

The purpose of decriminalisation is merely to reduce one of the biggest harms from illicit drugs: contact with the criminal justice system. It has certainly , especially among Black Americans, who are over-represented in the criminal justice system.

In the year before Measure 110 was passed, overdose deaths in Oregon were , up 69% on the previous year. Oregon was ranked of all US states for substance use disorders, and ranked of 50 states for access to treatment.

Decriminalisation on its own isn’t intended to directly reduce use or overdoses. Portugal’s success in reducing use and other harms, such as overdoses, is likely more to do with the significant investment in treatment and support. And as Oregon continues the roll-out of treatment program funding, there are indications 2023 overdose death rates have come down, tracking at of the year before.

Oregon’s overdose death rate is now one of in the .

We know treatment is the most effective and cost-effective way to reduce use and harms. A study in California found for every $1 spent on drug treatment, the $7 in other costs, primarily by reducing crime and increasing employment earnings.

Decriminalisation needs to be supported by treatment, support and evidence-based harm reduction measures, such as access to naloxone and drug checking.

Naloxone has been available for free with no prescription since July 2022 in Australia, and the will increase the availability of naloxone Australia-wide.

The Queensland government has given the green light to start operating, and Canberra’s fixed-site drug checking service has been until December 2024. The service checked nearly for their contents and provided more than in the first 12 months.

Will drug decriminalisation work in the ACT?

The ACT is Australia’s most progressive jurisdiction when it comes to drug laws. It possession more than 30 years ago, and in 2019 it introduced a “” model, removing all penalties for the use and possession of small amounts of homegrown cannabis for personal use.

It has the in Australia. There has been no change in rates of cannabis use, drug driving offences or hospital presentations, and there has been a significant reduction in the number of Canberrans being exposed to the police and criminal justice system.

Ultimately, we won’t know the full impact of decriminalisation in the ACT until the bill has been implemented for some time. But evidence from places such as Portugal says it will increase diversion from the criminal justice system, improve access to treatment and harm reduction, and reduce stigma towards people who use drugs. To significantly reduce drug use itself, the ACT also needs to increase investment in drug treatment.

If you are worried about your own or someone else’s alcohol or other drug use, you can contact the ³Ô¹ÏÍøÕ¾ Alcohol and other Drug Hotline on 1800 250 015 for free, confidential advice.

Nicole Lee is CEO at Hello Sunday Morning and also works as a consultant in the alcohol and other drug sector and a psychologist in private practice. She has previously been awarded funding by Australian and state governments, NHMRC and other bodies for evaluation and research into alcohol and other drug prevention and treatment.