I liga Rugby is the second tier league for rugby union in Poland. Originally there were two divisions, consisting of 8 teams in the Rugby Ekstraliga and 6 in I liga, however as the sport is growing in popularity and more and more teams are being registered, third division has now been created, the II liga Rugby.
For victory, a team gets four points, two points for a tie and zero for a loss. There is an extra point for a team that loses by 7 points or less, and an extra point for scoring 4 or more tries in a game. In the event of a forfeit, the team unable to play will be docked 1 point and their opponent will be awarded a score of 25-0 and 5 points.
The champions are promoted to the Rugby Ekstraliga, and the last placed team are relegated to the II liga Rugby.