Occupations: plumbers; ratio requirements for apprentices on jobsite; modify. Amends sec. 1117a of 2016 PA 407 (MCL 339.6117a).

HB 5221 would increase the required ratio of experienced plumbers to apprentices on construction sites in Michigan, changing it from 1 journey or master plumber per 2 apprentices to 1 per 5 apprentices. This directly affects plumbing contractors, who must comply with the new ratio on all jobsites. Violations would result in escalating fines ($5,000 for a first offense, $10,000 for a second, and a 90-day license suspension for a third), with fines paid to the enforcing agency. The bill also specifies that the state department can recover investigation costs and attorney fees for enforcement actions. (Note: This bill is pending review in the Government Operations Committee as of November 2025.)