The supervisors of any district may formulate regulations governing the use of lands within the district in the interest of conserving soil and soil resources and preventing and controlling soil erosion, and may conduct public meetings and hearings upon tentative regulations as may be necessary to assist the supervisors in this work. The proposed regulations must be embodied in a proposed ordinance for submission to the qualified electors in the district, and copies of the proposed ordinance must be available for inspection by the qualified electors in the district during the period of time between the publication of the notice of election upon the ordinance and the date of the election.