During the 2022–23 season, Uefa will test safe standing at men’s European club competitions in England, Germany, and France.
The governing body of European football will examine standing areas to determine whether it can be reinstated.
Only nations where safe standing is “authorized and implemented at a domestic level” are eligible.
The Premier League and the Championship received permission to implement safe standing areas in July.
The group stage and knockout rounds through and including the semifinals will be subject to the Uefa trial.
“The objective is to assess if and under what conditions standing may be reintroduced in Uefa competitions in a safe manner,” Uefa said.
Chelsea, Liverpool, Manchester City and Tottenham are in the Champions League, Arsenal and Manchester United in the Europa League, and West Ham in the European Conference League.
Safe standing areas have existed at Germany’s top-flight football grounds for a number of years – most famously at Borussia Dortmund’s Westfalenstadion.
Dortmund celebrated the news in a tweet, saying that for the first time their European home games will be attended by 81,365 fans – their usual official capacity for Bundesliga matches.