If the happening of an event, including marriage, divorce, performance of educational requirements, the attainment of a specified age, 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.
D.C. Code § 19-1310.07
Uniform Law: This section is based upon § 1007 of the Uniform Trust Code.