Prior to the establishing of any assessment district and the levying of any assessment, the county council shall hold a public hearing thereon after thirty (30) days' notice thereof published in a newspaper of general circulation in the county. Notice of the time and place of the hearing, together with a description of the programmed extension and the district to be established shall be mailed to the owner of each parcel of land proposed to be assessed for benefit received from the programmed extension, such mailing to be made by depositing a written notice in the United States mail at least two (2) weeks before the date of the hearing and to be to the owners and to their addresses as the same appear on the real property assessment records of the county. Prior to the hearing, the Washington Suburban Sanitary Commission shall be requested to furnish the county council with an engineering determination of the maximum area limits which could be served by the programmed extension; the estimated cost and time for construction of the extension; and the amounts and sources of funds available to the commission to defray the cost of the construction. If such information is not furnished, the hearing shall proceed on the basis of the information contained in the latest commission six-year capital improvements program approved under the provisions of title 7 of article 29 of the Annotated Code of Maryland, as amended. (1971 L.M.C., ch. 1, § 1.)