The Executive Committee of European football's governing body has agreed on a quota of one venue per country and will finalize the list of stadia in September of next year.
The European football governing body announced in December that Euro 2020 would be held in 13 cities all over the continent to mark 60 years of the tournament's existence.
At a meeting between members of its Executive Committee on Thursday, it was agreed that the edition's matches would be split into 12 packages of three group games and one knockout match and one package for the semifinals and the final.
But while each national association would be entitled to two bids - one for an ordinary package and the other for the last-four stage - there will be a limit of only one venue per country. Additionally, both semifinals and the final will be played in one stadium.
Stadia yet to be constructed can be admitted into the bidding process, but construction must have started by 2016, or its host city could risk losing out.
The key dates of the bidding process fall on September 11, when hosting candidates formalize their bids, and in September 2014 - the announcement of the final cities by the Executive Committee.