243.550.  Petition for reassessment of benefits, form — procedure for maintenance levy or for a new tax to pay costs of plan for reclamation. — Whenever the owners of twenty-five percent or more of the acreage of the lands in the district shall file a petition with the county commission stating that there has been a material change in the values of the property in the district since the last previous assessment of benefits or readjustment of the assessment of benefits and praying for a readjustment of the assessment of benefits for the purpose of making a more equitable basis for the levy of the maintenance tax or for the purpose of levying a new tax to pay the costs of the completion of the proposed works and improvements as shown in any supplemental plan for reclamation, or for both of the aforesaid purposes, the county commission shall give notice of the filing and hearing of the petition by posting such notice in a prominent place in the court house and by publication in a newspaper of general circulation in the county once a week for at least four consecutive weeks, the last insertion to be at least fifteen days prior to the hearing of the petition.  The notice may be in the following form:

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Upon hearing of the petition if the county commission finds that there has been a material change in the values of property in the district since the last previous assessment of benefits, the county commission shall order that there be made a readjustment of the assessment of benefits for the purpose of providing a basis upon which to levy the maintenance tax of the district or for the purpose of levying a new tax to pay the costs of the completion of the proposed works and improvements as shown in any supplemental plan for reclamation, or for both of the aforesaid purposes.