Administrative Procedures Act; establishing guidelines for interpretation of statutes or administrative rules. Effective date.

SB 639 requires courts and administrative hearing officers in Oklahoma to interpret state statutes, agency rules, or related documents from scratch ("de novo"), without deferring to agency interpretations. It mandates that when ambiguity remains after standard interpretation methods, courts must favor interpretations that limit agency power and maximize individual liberty. This bill directly affects courts, administrative hearing officers, state agencies, and individuals or entities challenging agency actions. The law takes effect on November 1, 2025.