So, if I understand: if an inadvertent whistle occurs during a passing or running play and foul occurs before the CSI, the team that no commit a foul as the option to take or decline the penality.
If they take the foul, the CSI point should be the basic spot for the enforcement, If they decline the penality, team in possession as the otpion to take the ball where CSI occur or replay the down and the penality's cancelled.
Exeption: the player discalified must leave the field.