The Department of Buildings administers trade licenses and registrations for more than 29,000 construction industry professionals, including General Contractors, Supervising Electricians, Electrical Contractors, Plumber's Apprentices, Plumbers, Plumbing Contractors, Mason Contractors, Steam Boiler Erectors, Stationary (Boiler) Engineers, Apprentice Crane Operators, Crane Operators, Supervising Elevator Mechanics, and Elevator Mechanic Contractors. Select a Security Question from a drop down box. The On-line renewal system will automatically e-mail you a Password for your use to access the renewal process. The Password may contain letters and numbers, and some of the letters may be capitalized and some may be lowercase. Access to this application is controlled by an on-line password management system. Previously, access was gained through a Department of Labor, Licensing, and Regulation (DLLR) assigned Personal Identification Number (PIN), mailed to the applicant. The City of Chicago has changed. Far cry 4 free download. Exams and License Renewals. 2018 International Union of Operating Engineers - Local 399 IUOE Local 399 Union Hall and.