On Thursday, Democratic lawmakers reintroduced the PRO Act, the sweeping labor rights bill that was passed by the House of Representatives last year. Construction groups representing workers, unions and employers alike say they are watching intently to see how the bill, or parts of it, would affect the industry if it becomes law.

By redefining “employees” and “employers” in revisions to the National Labor Relations Act, the Protecting the Right to Organize Act grants benefits to workers previously classified as independent contractors. Additionally, the way in which unions and employers collectively bargain and agree could be altered in states where unions have little to no say in the employee-employer relationship.