When the governing body of the municipality shall determine to construct an improvement as authorized by this Act (Article) or when it is petitioned by the owners of property to be benefited having an assessed value of at least 51 per cent of the total assessed value of all the property to be benefited from the proposed improvement, it shall adopt a resolution that such improvement shall be made. Said resolution shall describe the geographical limits of the proper ties to be benefited, and the location, nature, scope and extent of the improvement. The resolution shall also include a preliminary estimate of the costs prepared by an engineer licensed by the State of Tennessee, a declaration that the improvement will be designed and construction will be supervised by an engineer licensed by the State of Tennesse, and a statement of the proportion of total costs to be assessed against benefited properties, which shall not exceed 75 per cent of the total costs of the improvement; provided, however, that the total costs may be assessed against benefited properties if the governing body additionally pledges full faith and credit of the municipality to satisfy any deficiency in collections of improvement assessments. In all succeeding proceedings, the municipality shall be bound and limited by the resolution as it may be amended, except that the total costs assessed against benefited properties may exceed the preliminary estimate of costs by not more than 10 per cent. The resolution shall provide for a public hearing before the governing body at a time and place specified therein. The municipality shall publish the resolution and a notice of the hearing at least seven (7) days in advance of the hearing in a newspaper of general circulation in the municipality and by posting at the main office of the municipal government. Said notice shall state that any owner of property to be benefited may appear to be heard as to (a) whether the proposed improvement should be undertaken as planned, or abandoned, (b) whether the nature and scope of the improvement should be altered and (c) whether the improvement should be financed through the issuance of bonds on the "assessed value basis" as authorized by this Act (Article). Said notice should also be sent by first class mail to the owners of properties to be benefited, or their agents, of record at the time of adoption of the resolution, at the addresses currently entered on the property assessments records. [As added by Priv. Acts 1970, ch. 276, § 3]