Section 30.46 - Agricultural use(1) A person may develop or use land in the riverway for agricultural use that is not in agricultural use on October 31, 1989, if: (a) The development and use comply with the rules for the soil and water resource management program promulgated by the department of agriculture, trade and consumer protection under s. 92.14; and(b) The person otherwise complies with this subchapter in developing or using the land for agricultural use.(2) Notwithstanding sub. (1) (b), a person is not required to comply with rules for the soil and water resource management program promulgated under s. 92.14 by the department of agriculture, trade and consumer protection for land in the riverway and that is in agricultural use on October 31, 1989.(3) Notwithstanding sub. (1) (b), s. 30.44(1) does not apply to the construction, modification, repair or reconstruction of a structure that is used exclusively for agricultural use on land in the riverway if the land is in agricultural use on October 31, 1989.