It may be found in Condition 10, called Separation of Insureds:
10. Separation of Insureds.
Except with respect to the limits of insurance and any rights or duties specifically assigned in this policy to the first Named Insured, this insurance applies:
(a) As if each Named Insured were the only Named Insured; and
(b) Separately to each insured against whom claim is made or suit is brought.