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Plumbing License Requirements. Plumbers licensing requirements for a journeyman and master plumbers license are usually determined at the state level and the necessary requirements and exams vary in each State. The enforcing & regulating of the state plumbing licensing requirements often fall under individual municipalities.
Under the Illinois Plumbing License Law, the Department licenses plumbing contractors, plumbers, plumberâs apprentices, irrigation contractors, and retired plumbers. The Department also is responsible for the creation of a minimum plumbing code of standards.