M. Swiss Pairing Rules for European Team Competitions
M.1. The basic pairing system for ECU Team Competitions is the FIDE Olympiad Pairings Rules https://www.fide.com/fide/handbook.html?id=95&view=article with the following change in point C.10:
For pairing of all rounds the teams are ranked in the following order:
a. Match points
b. Olympiad Sonnenborn-Berger
c. Ranking number according to article 9.