The NSW government has lost its bid to halt industrial action on the state's train networks after a ruling by the industrial umpire.
The state government has had its case against the Rail, Tram and Bus Union dismissed by the Fair Work Commission on Saturday, after earlier in the week losing an initial bid to block the action.
The NSW government and Sydney Trains sought to terminate all industrial action taken by the rail union, arguing it was endangering life and causing economic impacts to the state.
It also called for a decision to be returned within five days.
The commission handed down its full decision on Saturday, dismissing the case by the government in full.
"I find that no part of the protected action of the Unions ... would threaten to endanger the life, the personal safety or health, or the welfare, of the population or of part of it, or cause significant damage to the Australian economy," Fair Work deputy president Bryce Cross wrote.
The union's NSW secretary Alex Claassens called the battle a waste of taxpayer's money.
"The NSW Government ran, and lost, a case aimed at stopping protected industrial action that doesn't even currently exist."
He said there are no plans to continue industrial action next week, and in recent days has accused the government of overplaying the union's role in network disruptions.
However the NSW government said its Fair Work Commission application had led to unions cancelling industrial action.
"By the union's own admission taking action in the Fair Work Commission was the only way the Government could force the unions to listen and keep our rail network operating with 60 per cent of the bans imposed by the unions now withdrawn," Acting Transport Minister Natalie Ward said in a statement on Saturday.
"We have a world-class train network, and the only reason it isn't providing world-class services is because the unions are playing politics. The people of NSW deserve better."
Mr Claassens said the union remained resolute on securing a government commitment on safety upgrades to a fleet of Korean-built trains.
"We don't want this circus of the government's making to continue.
"We need to sit down at the table and get a resolution that delivers safe trains and fair wages and conditions. It's as simple as that."
Mrs Ward said the unions have received a letter of commitment from the NSW government for reconfigurations to the new trains.
She urged an end to all remaining industrial action and called for continued negotiations to resolve the dispute.
"The NSW Government will continue to take all necessary steps to back the people and businesses of NSW and put an end to rail disruption."
Transport for NSW said industrial action along with COVID-related staff shortages and weather impacts had caused delays to services.
