1. Courts should decide only issues defined by the parties in their pleadings and should raise constitutional issues mero motu only in exceptional circumstances, which did not exist in this case. 2. Participation in proceedings without objection to jurisdiction, accepting favourable rulings and appealing adverse ones constitutes submission to jurisdiction. 3. Private bodies may exercise public functions based on empowering provisions including contracts, MOIs and codes of conduct, without requiring statutory authorization. PAJA contemplates this through its definition of 'empowering provision'. 4. The ARB is empowered to consider complaints about non-member advertisements for the benefit of its members, to enable members to decide whether to publish such advertisements, as confirmed in the Herbex precedent which established binding precedent in rem. 5. Clause 3.3 of the ARB's MOI, taken from the Herbex order, is constitutional. 6. Self-regulatory bodies like the ARB advance constitutional rights to freedom of expression (s 16) and freedom of association (s 18), including rights to self-regulation and to choose not to associate. 7. Administrative tribunals like the ARB do not limit access to courts under s 34 as they are 'tribunals or forums' contemplated by that section, and their decisions remain subject to judicial review. 8. Administrative tribunals need not follow court rules of evidence; procedural fairness under PAJA is flexible and context-dependent. 9. The mere fact that elements of a complaint before the ARB might overlap with causes of action that could be pursued in court does not mean the ARB ousts court jurisdiction.