Judicial interpretation: courts exclusively determine statutory meaning and fill legislative gaps consistent with legislative purpose. The court has the exclusive authority to authoritatively construe statutes and related instruments, spelling out legislative intention where language is unclear by deriving implications from text or elaborating meaning in light of public policy and legislative purpose. Internal interpretation clauses are aids to construction but do not displace the court's interpretive function, and judicial interpretation produces subsidiary rules under the doctrine of precedent that guide future application.