Be it further enacted, That the title of a bond ordinance under this Act shall state the amount appropriated, a brief description of the project or purpose, and the amount of bonds authorized to finance the appropriation. Bond ordinances shall be cited on bonds by title and date of final passage. Two or more projects may be combined to be financed by one bond issue, in which case the bond ordinance shall establish a separate appropriation and shall state separately the estimated maximum costs of each project, but the title of the ordinance need only state the aggregate total of such appropriations and the total amount of bonds to be authorized. [As replaced by Priv. Acts 1963, ch. 74, § 4]