This is the first of a two-part column. The second part will be published on Tuesday.One of the rules in the tenant manual Jones Lang LaSalle sent to Wacker Drive Executive Suites when Jones Lang, called JLL, became property manager at 125 S. Wacker Drive in Chicago — where Executive Suites, referred to as WDES, leased the third floor — said: “All contractors working in 125 S. Wacker must be union members …