The binding legal principles established by the majority are: (1) The LRA does not contemplate a category of 'invalid' or 'unlawful' dismissals distinct from 'unfair' dismissals. All dismissals under the LRA are either fair or unfair (including automatically unfair), and remedies are confined to those provided in the LRA. (2) Where a cause of action is based on breach of an LRA obligation, the litigant must seek remedies within the LRA using LRA dispute resolution mechanisms. A litigant cannot invoke common law remedies for LRA breaches ('LRA remedy for LRA breach' principle, applying Chirwa). (3) Non-compliance with the procedural time requirements in section 189A(8) does not render dismissals or dismissal notices invalid and of no force and effect. Such non-compliance may render dismissals procedurally unfair, but not invalid. (4) Whether a breach of a statutory provision results in nullity depends on a purposive interpretation considering: the statute's overall purpose, the purpose of the specific provision, whether the statute provides remedies for breach, the adequacy of those remedies, the mischief the provision addresses, and whether declaring invalidity is necessary to prevent the provision being breached with impunity. The use of 'must' or 'shall' is not determinative. (5) Section 189A provides adequate remedies for procedural breaches: section 189A(9) allows immediate strike action if dismissal notices are given prematurely; section 189A(13) provides for compelling compliance, interdicts, reinstatement until fair procedure is followed, and compensation. These are extensive and sufficient. (6) An order of reinstatement is not a competent remedy for an invalid dismissal. Reinstatement as a remedy presupposes a dismissal that is recognized as having occurred but is unfair. If a dismissal is invalid (a nullity), the employee was never dismissed and remains employed; no reinstatement is needed or possible.