The binding legal principles established are: (1) Procedural irregularities in public tender processes invalidate resulting contracts only where the irregularities are unlawful (contrary to law, not merely internal policy) and consequential (affecting the outcome). Inconsequential irregularities, even if numerous, do not invalidate procurement decisions. (2) A fair procurement process does not demand perfection. Section 217(1) of the Constitution and PAJA require fairness, but this must be assessed substantively and contextually, not formalistically. (3) Internal administrative policies and circulars are not legal instruments; non-compliance with them does not constitute unlawful conduct rendering decisions invalid. (4) Tender documents must be interpreted in a businesslike manner, giving effect to their commercial purpose rather than imposing formalistic or technical interpretations. (5) Clarifications issued to bidders before the closing date for submissions do not constitute impermissible amendments to tender documents, provided they do not fundamentally change what is being tendered for and all bidders are treated equally. (6) Courts will not interfere with the evaluative discretion of procurement bodies unless decisions are irrational, unreasonable or unlawful - mere disagreement with the wisdom of decisions is insufficient. (7) Bidders have no right to be awarded contracts and no legitimate expectation of being heard during the evaluation process. Natural justice principles requiring a hearing apply only where rights are affected or legitimate expectations exist. (8) Where alleged procedural irregularities would not have changed the substantive outcome of a tender process, courts will refuse to set aside the resulting contract, particularly where doing so would be gravely prejudicial to the public interest. (9) Public procurement serves the public interest, not merely the interests of competing bidders. Courts must weigh the interests of the public and the procuring entity when determining appropriate relief.