The Village Planning Commission's designated representative shall forward copies of the preliminary plat to such officials and agencies as may be necessary for the purpose of study and recommendation. These shall include at least the Village Engineer, Soil and Water Conservation District, and the County Health Department if applicable. After receipt of reports, if any, from such officials and agencies, the Village Planning Commission shall determine whether the preliminary plat shall be approved, approved with modifications, or disapproved. If a plat is disapproved, the reasons for such disapproval shall be stated in writing. The Village Planning Commission shall act on the preliminary plat within 30 days after filing unless such time is extended by agreement with the subdivider. When a preliminary plat has been approved by the Village Planning Commission, the chairman shall sign one copy for the file. Approval of the preliminary plat shall not constitute approval of the final plat.