CONCACAF announced today that its inaugural Nations League competition will kick off qualifying in September 2018. The tournament will begin with all but its top-six seeded teams playing four qualifiers from September to March 2019.
The seeding has been determined by CONCACAF’s new ranking index for senior men’s national teams, which gives points to teams based on “strength of the teams competing, home-field advantage, actual match performance and final result of the match, and importance of the match.” No word yet on how exactly those are all measured, but it seems to be meant as a kind of in-house version of the FIFA rankings.