house bill 5221 - Occupations: plumbers; ratio requirements for apprentices on jobsite; modify. Occupations: plumbers; ratio requirements for apprentices on jobsite; modify. Amends sec. 1117a of 2016 PA 407 (MCL 339.6117a). https://legislature.mi.govv/Home/GetObject?objectName=2025-HB-5221 Thu, 06 Nov 2025 11:19:33 GMT house bill 5221 bill electronically reproduced 11/05/2025 Occupations: plumbers; ratio requirements for apprentices on jobsite; modify. https://legislature.mi.govv/Home/GetObject?objectName=2025-HB-5221 https://legislature.mi.govv/Home/GetObject?objectName=2025-HB-5221 Thu, 06 Nov 2025 11:19:33 GMT