The binding legal principles are: (1) Where a parent contractually agrees that a school may refuse examination attendance or withhold results for non-payment of fees, such contractual terms are enforceable; (2) Payment by cheque is not complete until the cheque clears, and parties may lawfully agree that exchange rates or valuations will be determined at the date of clearance, not issue; (3) The principle ex turpi causa non oritur actio prevents a party from obtaining relief from an arrangement they contractually agreed to and participated in; (4) Private schools are entitled to institute systems for enhanced service delivery and debt collection, and where such systems are democratically adopted by the parent body, courts will uphold them as legitimate; (5) An order for contempt cannot be granted against an individual in their representative capacity when the respondent is the legal entity they represent - the order must be directed at the proper party.