90-minute debate, which will be moderated by ABC anchors David Muir and Linsey Davis, It's also expected to feature two commercial breaks, when campaign staff will not be allowed to interact with the candidates,
There will be no opening statements
There will be no live audience
Candidates' microphones will only be live when it's their turn to speak
Harris and Trump won't be able to ask questions of each other. Only the moderators — ABC's David Muir and Linsey Davis — are permitted to ask questions
During the debate, the candidates will have two minutes to answer questions and for rebuttals, along with an extra minute for follow-ups, clarifications or responses
No props or pre-written notes are permitted onstage.
Harris was allowed to chose podium placement. She selected the podium position to the right on screen
The candidates will have two minutes to deliver closing statements, and Trump will deliver the final statement after winning a coin toss
candidates will stand behind their lecterns for the "duration" of the debate, a rule that may remind viewers of a 2016 debate between Trump and former Secretary of State Hillary Clinton, when Trump left his place to linger near Clinton
A former aide to Hillary Clinton, who played Trump in the mock 2016 debate prep with Clinton, is playing Trump again in these sessions, with a source saying the aide is even dressing like Trump. Harris has also been practicing on a stage with lights to recreate the debate environment, a source familiar with the preparations told CBS News.