The Trump administration on Friday officially told the United Nations that the US intends to pull out of the 2015 Paris climate pact. But the State Department’s announcement doesn’t formally start the process of the US getting out of the voluntary agreement. The department described its communication as a “strong message” to the world, following President Donald Trump’s decision in June to leave the accord. “The State Department is telling the UN what the president already told the world on June 1 and it has no legal effect,” said Nigel Purvis, who directed US climate diplomacy during the Bill Clinton and George W. Bush administrations. Breathe easy, neither Trump nor critics of Paris pull-out will affect climate Purvis said countries can’t withdraw from new international agreements, including the Paris climate one, until three years after they go into effect. The Paris agreement went into effect on November 4, 2016. Then the process takes a year. The State Department cited the same timeline, saying it can officially start withdrawing as soon as November 2019. That means the earliest the US can be out of the climate agreement is November 4, 2020 – the day after the next presidential election. In a statement, the State Department said the US will continue to participate in international meetings and negotiations on current and future climate change deals. The next meeting is in Bonn, Germany, in November. Trump is “open to re-engaging in the Paris agreement if the United States can identify terms that are more favourable to it, its business, its workers, its people and its taxpayers,” the department said. Opinion: Why Trump was smart to dump Paris climate pact Under the agreement, countries set their own national plans for cutting climate emissions. That means Trump can come up with different targets for the United States than those set by President Barack Obama. But Trump can’t unilaterally change the text of the Paris deal. UN spokesman Stephane Dujarric confirmed that Secretary General Antonio Guterres received “a communication” from US Ambassador Nikki Haley “expressing the intention of the United States to exercise its right to withdraw from the Paris agreement, as soon as it is eligible to do so under the agreement, unless it identifies suitable terms for re-engagement”. “The secretary general welcomes any effort to re-engage in the Paris agreement by the United States,” he said. Under Obama, the US agreed to reduce emissions more than a quarter from 2005 levels by the year 2025. Critics argue the pact is meaningless as countries set their own goals and there are no reprisals if they don’t stick to them.