The 18 teams that hold UCI ProTeam status are obliged to participate in all races: the organisers of each race can invite other teams that hold UCI Pro-Continental status, or an ad-hoc national selection, to compete.
The 18 teams that hold UCI ProTeam status are obliged to participate in all races. The organisers of each race can additionally invite other teams that hold UCI Pro-Continental status, or an ad-hoc national selection, to compete.