term:

Pro Rata Clause

pro rata clause n

: a clause in an insurance policy limiting an insurer's liability for a loss to a proportionate share in relation to coverage collectible from other insurers for the same loss called also pro rata liability clause standard other insurance clause

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.