A bill to amend section 311(b) of the Federal Water Pollution Control Act to limit liability under such section to knowing and willful discharges and to provide certain defenses to liability under such section.

Amends the Federal Water Pollution Control Act to limit liability for discharges of oil or hazardous substances to knowing and willful discharges. Enumerates specified defenses to liability for violation of the prohibition against such discharges.