Wisconsin Statutes Employment, Compensation and Mining (Ch. 101 to 109) § 107.20. Maximum term for exploration mining leases

(1) Any provision of an exploration mining lease entered into after April 25, 1978, granting an option or right to determine the presence, location, quality or quantity of nonferrous metallic minerals shall be limited to a term not exceeding 10 years from the date on which the exploration mining lease is recorded in the office of the register of deeds of the county where the property is located, except that any provision of an exploration mining lease entered into after April 25, 1978, granting an option or right to determine the quality and quantity of nonferrous metallic minerals under a prospecting permit shall be limited to a term not exceeding 10 years from the date that the lessee applies for a prospecting permit under s. 293.35, if the lessee applies for the prospecting permit within 10 years from the date on which the exploration mining lease is recorded in the office of the register of deeds of the county where the property is located.

(2) Any provision of an exploration mining lease entered into after April 25, 1978, granting an option or right to develop or extract nonferrous metallic minerals shall be limited to a term not exceeding 50 years from the date on which the exploration mining lease is recorded in the office of the register of deeds of the county where the property is located.