Balls must comply with the IFAB Laws of the Game as well as with the UEFA Equipment Regulations.
For the league phase matches, quarter-finals and play-offs, the host association must provide the visiting team with match balls of excellent quality for its training session on the day before the match as well as for warming up before the match. These match balls must be the same as those used for the match.
For matches and official training sessions during the finals, balls are supplied exclusively by UEFA.
A multi-ball system must be used at all matches in accordance with the protocol and guidance issued by the UEFA administration.
The use of two-sided substitution boards (preferably electronic) is compulsory for all matches. For each match in the league phase, quarter-finals and play-offs, the host association must ensure a minimum of two boards.