Except as provided in subsection (b) of this section, a person violating this chapter is liable to the United States Government for a civil penalty of not more than $25,000. Each day of a continuing violation is a separate violation. A vessel involved in the violation also is liable in rem for the penalty.

A person violating section 2602 of this title is liable to the United States Government for a civil penalty of not more than $10,000. Each day of a continuing violation is a separate violation. A vessel involved in the violation also is liable in rem for the penalty.

Any person that knowingly violates, or that knowingly aids, abets, authorizes, or instigates a violation of this chapter, shall be fined under title 18, imprisoned for not more than 3 years, or both.

The court, the Secretary of Transportation, or the Administrator, as the case may be, may pay up to one-half of a fine or penalty to any person giving information leading to the assessment of the fine or penalty.