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Dual Officiating System
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2021 SOCCER GUIDE
nfhs.orgthe Dual Officiating System, The Diagonal System of Control (DSC) and the Double- Dual System. Decisions of the Int’l. F.A. Board are official interpretations. Additional Interpretations in the U.S. can be obtained initially through the U.S. Soccer Referee Department or the State Director of Instruction (SDI). Questions