(a) Under 33 U.S.C. 2703(c)(1), persons specified in § 137.1(a), including environmental professionals, must report the incident as required by law if they know or have reason to know of the incident.

(b) This part does not limit or expand disclosure obligations under any Federal, State, tribal, or local law. It is the obligation of each person, including environmental professionals, conducting inquiries to determine his or her respective disclosure obligations under Federal, State, tribal, and local law and to comply with them.