Here's how you can watch live and what time the candidates will compete against each other on Tuesday

Vice President Kamala Harris and former President Donald Trump will meet for the first time on Tuesday when they face off in a presidential debate hosted by ABC News.

The first debate between the Democratic and Republican presidential candidates comes after President Biden dropped his re-election bid in July. His decision was in response to calls from his own party for him to step down following his much-criticized performance at the CNN debate against Trump on June 27.

Now that the Harris and Trump campaigns have agreed to ABC's rules after weeks of uncertainty, here's everything you need to know:

⌚ When, where and how can you watch?

The debate on September 10 is scheduled to begin at 9 p.m. ET and last 90 minutes with two commercial breaks. It will take place at the National Constitution Center in Philadelphia – a deeply Democratic city. Pennsylvania is considered an important swing state in the 2024 election cycle. President Biden managed to win the state by a narrow margin in 2020.

You can watch it on all ABC News channels, including ABC News Live online streaming, Disney+ and Hulu.

You can also find real-time reporting and analysis from our editorial team at YahooNews.com.

🗣️ Who moderates the debate?

The debate will be moderated by World News Tonight host and editor-in-chief David Muir and ABC News Live Prime host Linsey Davis.

Muir has been with ABC since 2003. The Sept. 10 debate is not Muir's first appearance, as he previously moderated debates for the presidential primaries in 2016 and 2020. He has also given interviews with both sides of the political spectrum, including a June interview with President Biden for the network's D-Day coverage. He was the first journalist to interview Trump as president at the White House in 2017.

Davis has been with ABC since 2007 and also moderated the 2019 and 2020 presidential debates and reported on the Democratic and Republican National Conventions.

📖 What are the debate rules?

Debate rules regarding microphones initially became a point of contention for both campaigns. Harris' campaign wanted the microphones to remain on the entire time, while Trump's campaign wanted to turn them on only for the candidate whose turn it was to speak, thus adhering to CNN's June 27 debate rules.

The Harris team agreed to the mute rule in a letter to ABC on Wednesday, citing the risk that Trump might stay away from the debate, but added that Harris would be “fundamentally disadvantaged” by the rule because it “would serve to protect Donald Trump from a direct exchange with the Vice President.”

ABC News has released the rules for its September 10 debate, which are similar to those for the Biden-Trump debate in June. They include:

• No live audience in the debate room, so there will be no opportunity for cheering or booing during the event.

• The candidates will not give an opening speech.

• Only moderators are allowed to ask questions.

• Candidates are given two minutes to answer a question, two minutes to respond and one minute to provide further explanations. The microphone will only be switched on for the candidate answering the question.

• The order of the closing arguments, which last two minutes per candidate, and the placement of the candidates' lecterns on the stage were determined by a coin toss. Trump won the coin toss and chose to deliver the final closing argument. Harris chose to have her lectern appear on the right side of the screen (on the left of the stage).

• During the entire debate, the candidates stand behind their respective podiums. They are not allowed to bring props or pre-written notes. Each candidate is given a notepad, a pen and a bottle of water.

• There will be two commercial breaks during which campaign staff will not be able to interact with their candidates.

📺 How did the candidates qualify for the ABC debate?

The requirements are very similar to those of the June 27 debate moderated by CNN. As outlined by ABC, candidates had to meet the constitutional requirements under Article II, Section 1 to serve as president. They also had to have filed a declaration of candidacy with the Federal Election Commission.

They also had to meet election and voting requirements by September 3 to get a spot on the stage. A candidate had to appear on a certain number of ballots to reach the 270 electoral vote threshold and win the presidency. The candidate also had to receive at least 15% of the vote in four separate national polls of registered or likely voters.

According to ABC, only Harris and Trump met these requirements. This means that independent candidates and third-party candidates such as Cornel West and Jill Stein will not appear on the debate stage. Meanwhile, independent candidate Robert F. Kennedy Jr. suspended his presidential campaign on August 23 and endorsed Trump.

🗓 Are further debates planned?

The Harris team announced on August 15 that both teams had agreed to three debates before Election Day – two for Harris against Trump and one for the vice presidential candidates, Democratic Minnesota Governor Tim Walz and Republican Senator JD Vance of Ohio.

As of this writing, the September 10 debate is the only presidential debate before the November 5 election. Walz and Vance will face off in a vice presidential debate hosted by CBS News on October 1.

Photo credit: Photo illustration: Yahoo News; Photos: Bill Pugliano/Getty Images, Win McNamee/Getty Images