Due to the COVID-19 pandemic, stadiums were initially limited to 50% capacity, with the spectators also being subject to compliance with social distancing and the wearing of face masks.

[3] In mid September 2021, the Football Union postponed the next three Levski Lom matches (two for the league and one for the Cup) after 12 of the team's players tested positive for the coronavirus.

[5] From 21 October, a prerequisite to fan attendance was the possession of a green certificate, entailing proof of vaccination, recovery from an infection or a negative COVID-19 test.

[6] From 24 February 2022, the green pass was no longer required for spectators, though it remained in place for the staff and event organizers.

Clubs in the domestic league can have more than one sponsorship per jersey which can feature on the front of the shirt, incorporated with the main sponsor or in place of it; or on the back, either below the squad number or on the collar area.