Okla. Stat. tit. 60, § 1609.4
If the happening of an event, including marriage, divorce, performance of educational requirements, or death, affects the administration or distribution of a trust, a trustee who has exercised reasonable care to ascertain the happening of the event is not liable for a loss resulting from the trustee's lack of knowledge.
Laws 2025, HB 1850, c. 254, § 68, eff. November 1, 2025.