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CIF rules that apply to all schools in al the state's sections do not permit dual participation during the season. If you play any "outside competition" (even a scrimmage, depending on the circumstances), you lose 2 HS games for every outside game played (and that is a first time sanction; repeat offenses is not 2:1 again but you are suspended for the season).
Fun fact: this even includes YNT games and ODP (and PDP up here in NorCal) games if they have not been given prior approval by CIF. Google "Jacey Pederson/Palo Alto High School" to see what happens if not properly approved.