§ 30911. Costs and interest

• (a) A judgment against the United States or a federally-owned corporation under this chapter may include costs and interest at the rate of 4 percent per year until satisfied. Interest shall run as ordered by the court, except that interest is not allowable for the period before the action is filed.
• (b) Notwithstanding subsection (a), if the claim is based on a contract providing for interest, interest may be awarded at the rate and for the period provided in the contract.