Laws of the Game
12. Commercial advertising
No form of commercial advertising, whether real or virtual, is permitted on the field of play, on the ground within the area enclosed by the goal nets, the technical area or the referee review area (RRA), or on the ground within 1 cm (0.01 yd) of the boundary lines from the time the teams enter the field of play until they have left it at half-time and from the time the teams re-enter the field of play until the end of the match. Advertising is not permitted on the goals, nets, flagposts or their flags and no extraneous equipment (cameras, microphones, etc.) may be attached to these items.
In addition, upright advertising must be at least:
1cm (0.01 yd) from the touchlines
the same distance from the goal line as the depth of the goal net
1 cm (0.01 yd) from the goal net