The binding legal principles are: (1) Private schools conducting disciplinary proceedings must comply with their own disciplinary codes and cannot unilaterally deviate from prescribed procedures, including by appointing decision-makers not provided for in the code; (2) Parents designated as "observers" in disciplinary proceedings, rather than active participants as required by the applicable code, cannot be found to have waived their right to challenge those proceedings by failing to attend; (3) A party asserting waiver bears the strict onus of proving that the other party, with full knowledge of their rights, decided to abandon them either expressly or by conduct plainly inconsistent with an intention to enforce them; (4) When a party has previously acceded to an objection by adjourning proceedings, and the objecting party has engaged legal representation who raise further objections, procedural fairness requires that notice be given before proceeding despite those objections; (5) An application for interdictory relief against disciplinary proceedings is not premature where there is reasonable apprehension of prejudice (such as expulsion), as established by the applicable code itself; (6) For interim interdictory relief, a prima facie right is established where the applicant's undisputed facts, together with inherent probabilities, could support final relief at trial, even if the respondent merely contradicts rather than convincingly explains the applicant's case.