Any person who shall sustain injury by reason of any knowing (including willful) violation of a consumer product safety rule, or any other rule or order issued by the Commission may sue any person who knowingly (including willfully) violated any such rule or order in any district court of the United States in the district in which the defendant resides or is found or has an agent, shall recover damages sustained and may, if the court determines it to be in the interest of justice, recover the costs of suit, including reasonable attorneys' fees (determined in accordance with section 2060(f) of this title) and reasonable expert witnesses' fees: Provided, That the matter in controversy exceeds the sum or value of $10,000, exclusive of interest and cost, unless such action is brought against the United States, any agency thereof, or any officer or employee thereof in his official capacity.
Except when express provision is made in a statute of the United States, in any case in which the plaintiff is finally adjudged to be entitled to recover less than the sum or value of $10,000, computed without regard to any setoff or counterclaim to which the defendant may be adjudged to be entitled, and exclusive of interests and costs, the district court may deny costs to the plaintiff and, in addition, may impose costs on the plaintiff.
The remedies provided for in this section shall be in addition to and not in lieu of any other remedies provided by common law or under Federal or State law.