In addition, the business must not be operating as a casino as described in OAR 177-040-0061. (7) Guarantor: If the applicant is an entity other than either a sole proprietor who is a natural person or a private club as defined in ORS 471.175(8), at least one natural person who is a principal of the applicant entity and who is a key person may be required to personally guarantee all monies owed to