# ENDORSEMENT 4

This endorsement, effective 12:01 A.M., May 21, 1977, forms a part of policy No. GC 550 18 52 issued to International Business Machines Corporation by Lexington Insurance Company.

In consideration of the premium charged, it is agreed that the insurance afforded by this policy shall not apply with respect to liability arising out of the ownership, maintenance, use or operation of airfields, runways, hangars, buildings or other properties in connection with aviation activities or airports.

All other terms and conditions remain unchanged.

6/16/77 pmr

Form 1803