Legislation may be effectively introduced, filed, discussed, amended, changed, read, adopted or otherwise considered at any session of the Board of Supervisors subject to the limitations of Section 331.302 of the Code of Iowa. Publication and notice requirements must be in compliance with Sections 331.302, 331.305 and Chapter 21 of the Code of Iowa. Legislation may be considered for a reasonable length of time after filing provided there is reasonable continuity in the consideration. Irregular acts of the Board may be corrected at subsequent meetings prior to final passage. Actions may be reconsidered until the final vote on that action. Actions may be rescinded before the legislation becomes effective or at any time unless vested personal or property rights will be affected. Actions may be repealed or amended in accordance with Section 331.302 of the Code of Iowa. Legislative acts are prospective.