Hold hearings and conduct investigations and make recommendations to the City Commission relative to future plans and developments of the City of San Benito, Texas. All hearings conducted by the Planning and Zoning Commission relative to proposed changes or amendments to the zoning ordinance of the City of San Benito, and proposed zoning of new additions to the City of San Benito, shall be open to the public and all owners of properties, or the persons rendering the property for city taxes, affected by such proposed zoning changes or amendments or new zoning, and owners of property, or the persons rendering such property for city taxes, located within two hundred (200) feet of any property affected by such proposed zoning changes or amendments or new zoning, shall be given written notice within not less than ten (10) days before any such hearing is held by depositing such notices properly addressed and postage paid, in the United States Mail, setting forth the time and place where such meeting shall be held. Upon the holding of such hearings by the Planning and Zoning Commission, all person entitled to notices as above stated, shall be given an opportunity to present evidence for or against the proposed new zoning and if necessary to permit all persons to be heard, [and] such hearings may be continued from day to day and from time to time as shall be necessary to give all persons desiring to do so, an opportunity to be heard.