If, after the hearing provided for in this article, the council shall determine for any of the reasons set forth in section 45-27 that a special sewer assessment district is required for the public interest, health, safety or welfare, it shall by law designate the area of such assessment district and direct that the programmed extension be undertaken pursuant to agreements entered into with the Washington Suburban Sanitary Commission for the construction of such facilities under the authority contained in section 1-206 of article 29 of the Annotated Code of Maryland, as amended. The council at or about the time of enactment of such law shall by resolution describe generally the work to be done, determine the benefit to all properties affected thereby and estimate the cost to be borne by benefitted properties. (1971 L.M.C., ch. 1, § 1.)