There is a “Related Bidding Entry” rule that limits to 3; those bidding entities from simultaneously participating in the sale. The reason for this is so that the same entity does not have more than three bidders at the same time, thus increasing the likelihood of its obtaining a parcel in the auction. Essentially, a related bidding entity is a tax buyer who has an ownership interest or contractual relationship with any other registrant at the tax sale. Participants can only submit one registration, per FEIN Number. The determination of whether registered entities are related, must be self-disclosed on the registration form. Enforcement is at the discretion of the Rock Island County Treasurer.