The binding legal principles established are: (1) Medical schemes are not trustees of PMSA funds but hold them as their own assets subject to contractual obligations to members; (2) The relationship between a medical scheme and its members is fundamentally commercial and contractual, not fiduciary, as evidenced by the MSA's definition of "business of a medical scheme" which contemplates undertaking liability in return for premiums/contributions; (3) When member contributions (including PMSA allocations) enter a medical scheme's bank account under section 26(1)(c), they become assets of the scheme, not trust property; (4) Section 35(9)(c)'s requirement that PMSAs be reflected as liabilities presupposes they are also assets - the solvency margin requirement in section 35(3) (assets must exceed liabilities) would otherwise be impossible to satisfy without finding additional external assets; (5) A medical scheme may retain interest earned on PMSA funds as part of the commercial quid pro quo for providing members with advance access to their annual PMSA allocation; (6) Administrative instruments (circulars, regulations) that derive their entire legal force from a judicial decision or statute fall when that foundation is removed, without requiring separate setting aside - the principle is analogous to regulations falling when the enabling Act is declared invalid; (7) For a review ground under PAJA section 6(2)(d), an applicant must prove both the existence of an error of law and that the error materially influenced the decision; (8) Sections 37 and 38 of the MSA must be read as an integrated whole - section 37 empowers the Registrar to determine the form of financial statements, while section 38 provides the enforcement mechanism through rejection powers.