The story
Until 2007, the competition were held as a single round-robin tournament; the champions were determined by the number of points earned. Beginning with the 2007 season, the structure of the championship was changed to two divisions: Division A, where the top teams plays for the title, and Division B, where the rest play for ranking only.
From Wikipedia’s article on Belarusian Women's Volleyball League, shared under CC BY-SA 4.0.3