Title 33 › Chapter 40— OIL POLLUTION › Subchapter I— OIL POLLUTION LIABILITY AND COMPENSATION › § 2703
A responsible party does not have to pay cleanup costs or damages if they can show it is more likely than not that the spill or threat came only from an act of God, an act of war, or the actions of a third party (not the party’s employee or someone working under a contract with them), and if the party handled the oil carefully and took reasonable steps to guard against likely third‑party problems. If the person making a claim caused the incident by serious carelessness or on purpose, the responsible party is not liable to that claimant for the part the claimant caused. The safe‑harbor is lost if the responsible party knew about the spill and failed to report it, refused to help with cleanup when asked, or refused without good cause to follow official orders. Special rules apply when a party acquired property. Contracts, deeds, easements, leases, and similar documents count as contractual relationships. A buyer who got the property after oil was placed there can still avoid liability if they prove they had no reason to know about the oil, or if they are a government acquiring the site involuntarily, or if they inherited the property. To show no reason to know, the buyer must prove they did proper inquiries before buying and took reasonable steps to stop the release, prevent threats, and limit exposure. Within two years after August 9, 2004, the Secretary must write rules about what counts as proper inquiries (including using an environmental professional, interviews, record searches, visual inspections, and other listed checks). For property bought before May 31, 1997 courts consider several factors; for purchases on or after that date, until the Secretary’s rules exist, the ASTM E1527–97 standard applies. Prior owners remain liable, and anyone who knew of a problem and sold without telling is treated as liable. Finally, the defenses do not apply if the responsible party’s own acts or failures helped cause the spill.
Full Legal Text
Navigation and Navigable Waters — Source: USLM XML via OLRC
Legislative History
Reference
Citation
33 U.S.C. § 2703
Title 33 — Navigation and Navigable Waters
Last Updated
Apr 18, 2026
Release point: 119-83