Wisconsin Statutes Employment, Compensation and Mining (Ch. 101 to 109) § 104.08. Apprentices

(a) “Trade” means an occupation involving physical labor and characterized by mechanical skill and training such as render a period of instruction reasonably necessary.

(b) “Trade industry” means an industry involving physical labor and characterized by mechanical skill and training such as render a period of instruction reasonably necessary.

(3)(a) The department shall investigate, determine, and declare what occupations and industries are included within a “trade” or a “trade industry.”

(b) The department may make exceptions to the operation of sub. (2m) when conditions make its application unreasonable.