1. Individuals performing unlicensed plumbing work must be formally registered unless they are plumber's apprentices. (Source: https://www.revisor.mn.gov/statutes/cite/326B.47; verbatim: “All unlicensed individuals, other than plumber's apprentices and individuals who have completed pipe laying training as prescribed by the commissioner, must be registered under subdivision 3.”)
2. Apprentices and registered unlicensed individuals can only perform plumbing work while directly supervised by a licensed plumber. (Source: https://www.revisor.mn.gov/statutes/cite/326B.47; verbatim: “Licensed individuals shall not permit plumber's apprentices or registered unlicensed individuals to perform plumbing work except under the direct supervision of an individual actually licensed to perform such work.”)
3. The supervising licensed plumber must be employed by the same company as the apprentice or unlicensed individual. (Source: https://www.revisor.mn.gov/statutes/cite/326B.47; verbatim: “The supervising master, restricted master, journeyworker, or restricted journeyworker must be licensed and must be employed by the same employer as the plumber's apprentice or registered unlicensed individual.”)
4. A candidate must complete four years of practical plumbing experience to qualify for the journeyworker exam. (Source: https://www.revisor.mn.gov/statutes/cite/326B.47; verbatim: “A plumber's apprentice or registered unlicensed individual who has completed four years of practical plumbing experience is eligible to take the journeyworker plumbing examination.”)
5. The state's Plumbing Board prescribes rules for the registration of unlicensed individuals. (Source: https://www.revisor.mn.gov/statutes/cite/326B.47; verbatim: “The Plumbing Board may prescribe rules, not inconsistent with this section, for the registration of unlicensed individuals.”)