The 130th IOC Session met at the SwissTech Convention Centre in Lausanne to discuss the proposal made by the IOC Executive Board on 9 June.

The IOC membership approved the following proposal:

"Recognising the exceptional circumstances and unique opportunities presented by the candidatures of Los Angeles and Paris for the Olympic Games 2024, the International Olympic Committee takes the following decision:

1. To authorise the IOC Executive Board to conclude a tripartite agreement with Los Angeles and Paris and their respective NOCs for the simultaneous election of the host cities of the Olympic Games 2024 and 2028 during the 131st IOC Session in Lima;

2. Should such tripartite agreement be concluded, the 131st IOC Session will ratify the tripartite agreement, thereby electing one city for the Olympic Games 2024 and the other city for the Olympic Games 2028. To that effect, the 130th IOC Session hereby waives the seven-year deadline set out in Rule 33.2 of the Olympic Charter; and

3. Should such tripartite agreement not be concluded, the 131st IOC Session will proceed with the election of the host city 2024 in accordance with the current election procedure."

Seconds after this decision, Los Angeles Mayor Eric Garcetti and Paris Mayor Anne Hidalgo signalled their desire to reach an agreement by making a surprise joint appearance before the Session to thank IOC Members.

Earlier in the day, the delegations of Los Angeles 2024, led by Mayor Garcetti, and Paris 2024, led by the President of the French Republic, Emmanuel Macron, made outstanding and emotional presentations at the 2024 Candidate City Briefing.

IOC President Thomas Bach called the IOC decision a "golden opportunity" for all concerned.

"Ensuring the stability of the Olympic Games for 11 years is something extraordinary," the IOC President said later at a press conference with the two mayors and leaders from the two candidatures. "That is why we say this is a great day for the Olympic Games and the Olympic Movement, and it's a great day also for these two wonderful cities, these two great Olympic cities," he stressed.

President Bach added that it was only the second time he had been stunned into momentary silence by good news, the first being after he was elected IOC President in 2013.

The two mayors said they were eager to start their discussions over which city would go first and expressed confidence that they can reach an agreement.

"In Olympic history there's only been 37 times in which there has been a tie for a gold medal. Maybe today is the 38th," Mayor Garcetti said. "For Los Angeles, it's a golden opportunity, one that we don’t take lightly."

Mayor Hidalgo said: "I am fully committed with the Paris team to putting all my energy, our creativity and my resolve into reaching an agreement for Paris to experience once again this Olympic adventure that it has been longing for for 100 years."

French President Emmanuel Macron said earlier that he had signalled his support for a dual award even before the IOC formally approved the concept.

"We are ready to work with them on this 'win-win-win' approach," President Macron said.