The assistant referee flags for an offside

assistant referee flags, offside flag, football referee, soccer referee, football officiating, soccer officiating, assistant referee signal, offside call, football linesman, soccer linesman, referee flag, assistant referee action, offside decision, football rules, soccer rules, referee signaling, football officiate, soccer officiate, offside signal, assistant referee role, football match officiating, soccer match officiating, referee communication, assistant referee duties, offside enforcement, football game referee, soccer game referee, referee flag signal, assistant referee whistle, football officiating signal, soccer officiating signal, referee control, assistant referee movement, football offside call, soccer offside call, referee responsibility, assistant referee flag, offside judgment, football officiating action, soccer officiating action, referee and linesman, football referee decision