Section 91.18 - Requirements for certification of plan(1) A farmland preservation plan qualifies for certification under s. 91.16 if it complies with all of the following:(a) The requirements in s. 91.10(1) and (2).(b) Any other requirements that the department specifies by rule.(2) An amendment to a farmland preservation plan qualifies for certification under s. 91.16 if it complies with all of the requirements in sub. (1) that are relevant to the amendment and it does not cause the farmland preservation plan to violate any of the requirements in sub. (1).