The binding legal principles established are: (1) Hearsay evidence (including disciplinary hearing transcripts) may be admitted in arbitration proceedings, but the weight afforded to such evidence must be carefully calibrated based on factors including: the reliability and completeness of the record, whether the evidence was tested through cross-examination, whether there is corroboration, the reason for the witness's unavailability, and any prejudice to the party against whom it is tendered. Not all hearsay carries equal weight - 'hearsay of a special type' (comprehensive bilateral records of quasi-judicial proceedings with tested evidence) may carry more weight than simple witness statements. (2) The test for reviewing arbitration awards under section 145 of the LRA is whether the decision is one that a reasonable decision-maker could reach (Sidumo test). Courts must evaluate the totality of circumstances and evidence, not conduct a piecemeal analysis of individual factors. The award must be assessed holistically - both the reasoning and result must be unreasonable before interference is warranted. A result is unreasonable only if entirely disconnected from or unsupported by evidence. (3) Where an employer deports or otherwise makes unavailable a key witness upon whom their case depends, they bear the consequences of that witness's absence and cannot later complain about inability to prove their case through that witness. (4) Arbitration proceedings are de novo - the Commissioner determines fairness independently based on their own sense of fairness applied to established standards, not merely reviewing the employer's decision for correctness. (5) Non-compliance with court rules regarding timeous filing and complete records, while irregular and unacceptable, does not automatically result in dismissal where justice and finality are better served by determining the matter on its merits, particularly where the opposing party is not severely prejudiced.