EXHIBIT 99.1 FIRST AMENDMENT TO COMMERCIAL LEASE AGREEMENT This lease Amendment Agreement ("Lease Amendment") made on December 31, 2005, between R. & R. Partners, 3521 SCOTT STREET, SAN FRANCISCO, CA 94123-1056 (referred to herein as "Lessor"), and...Commercial Lease Agreement • January 3rd, 2006 • American River Bankshares • State commercial banks
