Skip to Content
On This Page

Lamb-Weston rule

The Lamb-Weston rule prescribes a way of apportioning coverage among multiple applicable policies that imposes pro rata sharing of covered losses, regardless of the policies' "other insurance" provisions.

Additional Information


Lamb-Weston, Inc. v. Oregon Auto. Ins. Co., 219 Or. 110, 341 P.2d 110 (Or. S. Ct. 1959).