(a) Requirement As soon as a person has knowledge of any release from a vessel or facility into the navigable waters of the United States of any object that creates an obstruction prohibited under section 10 of the Act of March 3, 1899, popularly known as the Rivers and Harbors Appropriations Act of 1899 ( 33 U.S.C. 403 ), such person shall notify the Secretary and the Secretary of the Army of such release. (b) Restriction on use of notification Any notification provided by an individual in accordance with subsection (a) may not be used against such individual in any criminal case, except a prosecution for perjury or for giving a false statement. C Condition for entry into ports in the United States 70021. Conditions for entry to ports in the United States (a) In general No vessel that is subject to chapter 37 shall operate in the navigable waters of the United States or transfer cargo or residue in any port or place under the jurisdiction of the United States, if such vessel— (1) has a history of accidents, pollution incidents, or serious repair problems that, as determined by the Secretary, creates reason to believe that such vessel may be unsafe or may create a threat to the marine environment